http://jointjs.com/js/joint.all.min.js as of 2015-10-02

gistfile1.txt

/*! JointJS v0.9.3 - JavaScript diagramming library  2015-06-26 


This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
/*!
 * jQuery JavaScript Library v2.1.3
 * http://jquery.com/
 *
 * Includes Sizzle.js
 * http://sizzlejs.com/
 *
 * Copyright 2005, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-12-18T15:11Z
 */

(function( global, factory ) {

	if ( typeof module === "object" && typeof module.exports === "object" ) {
		// For CommonJS and CommonJS-like environments where a proper `window`
		// is present, execute the factory and get jQuery.
		// For environments that do not have a `window` with a `document`
		// (such as Node.js), expose a factory as module.exports.
		// This accentuates the need for the creation of a real `window`.
		// e.g. var jQuery = require("jquery")(window);
		// See ticket #14549 for more info.
		module.exports = global.document ?
			factory( global, true ) :
			function( w ) {
				if ( !w.document ) {
					throw new Error( "jQuery requires a window with a document" );
				}
				return factory( w );
			};
	} else {
		factory( global );
	}

// Pass this if window is not defined yet
}(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {

// Support: Firefox 18+
// Can't be in strict mode, several libs including ASP.NET trace
// the stack via arguments.caller.callee and Firefox dies if
// you try to trace through "use strict" call chains. (#13335)
//

var arr = [];

var slice = arr.slice;

var concat = arr.concat;

var push = arr.push;

var indexOf = arr.indexOf;

var class2type = {};

var toString = class2type.toString;

var hasOwn = class2type.hasOwnProperty;

var support = {};



var
	// Use the correct document accordingly with window argument (sandbox)
	document = window.document,

	version = "2.1.3",

	// Define a local copy of jQuery
	jQuery = function( selector, context ) {
		// The jQuery object is actually just the init constructor 'enhanced'
		// Need init if jQuery is called (just allow error to be thrown if not included)
		return new jQuery.fn.init( selector, context );
	},

	// Support: Android<4.1
	// Make sure we trim BOM and NBSP
	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,

	// Matches dashed string for camelizing
	rmsPrefix = /^-ms-/,
	rdashAlpha = /-([\da-z])/gi,

	// Used by jQuery.camelCase as callback to replace()
	fcamelCase = function( all, letter ) {
		return letter.toUpperCase();
	};

jQuery.fn = jQuery.prototype = {
	// The current version of jQuery being used
	jquery: version,

	constructor: jQuery,

	// Start with an empty selector
	selector: "",

	// The default length of a jQuery object is 0
	length: 0,

	toArray: function() {
		return slice.call( this );
	},

	// Get the Nth element in the matched element set OR
	// Get the whole matched element set as a clean array
	get: function( num ) {
		return num != null ?

			// Return just the one element from the set
			( num < 0 ? this[ num + this.length ] : this[ num ] ) :

			// Return all the elements in a clean array
			slice.call( this );
	},

	// Take an array of elements and push it onto the stack
	// (returning the new matched element set)
	pushStack: function( elems ) {

		// Build a new jQuery matched element set
		var ret = jQuery.merge( this.constructor(), elems );

		// Add the old object onto the stack (as a reference)
		ret.prevObject = this;
		ret.context = this.context;

		// Return the newly-formed element set
		return ret;
	},

	// Execute a callback for every element in the matched set.
	// (You can seed the arguments with an array of args, but this is
	// only used internally.)
	each: function( callback, args ) {
		return jQuery.each( this, callback, args );
	},

	map: function( callback ) {
		return this.pushStack( jQuery.map(this, function( elem, i ) {
			return callback.call( elem, i, elem );
		}));
	},

	slice: function() {
		return this.pushStack( slice.apply( this, arguments ) );
	},

	first: function() {
		return this.eq( 0 );
	},

	last: function() {
		return this.eq( -1 );
	},

	eq: function( i ) {
		var len = this.length,
			j = +i + ( i < 0 ? len : 0 );
		return this.pushStack( j >= 0 && j < len ? [ this[j] ] : [] );
	},

	end: function() {
		return this.prevObject || this.constructor(null);
	},

	// For internal use only.
	// Behaves like an Array's method, not like a jQuery method.
	push: push,
	sort: arr.sort,
	splice: arr.splice
};

jQuery.extend = jQuery.fn.extend = function() {
	var options, name, src, copy, copyIsArray, clone,
		target = arguments[0] || {},
		i = 1,
		length = arguments.length,
		deep = false;

	// Handle a deep copy situation
	if ( typeof target === "boolean" ) {
		deep = target;

		// Skip the boolean and the target
		target = arguments[ i ] || {};
		i++;
	}

	// Handle case when target is a string or something (possible in deep copy)
	if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
		target = {};
	}

	// Extend jQuery itself if only one argument is passed
	if ( i === length ) {
		target = this;
		i--;
	}

	for ( ; i < length; i++ ) {
		// Only deal with non-null/undefined values
		if ( (options = arguments[ i ]) != null ) {
			// Extend the base object
			for ( name in options ) {
				src = target[ name ];
				copy = options[ name ];

				// Prevent never-ending loop
				if ( target === copy ) {
					continue;
				}

				// Recurse if we're merging plain objects or arrays
				if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
					if ( copyIsArray ) {
						copyIsArray = false;
						clone = src && jQuery.isArray(src) ? src : [];

					} else {
						clone = src && jQuery.isPlainObject(src) ? src : {};
					}

					// Never move original objects, clone them
					target[ name ] = jQuery.extend( deep, clone, copy );

				// Don't bring in undefined values
				} else if ( copy !== undefined ) {
					target[ name ] = copy;
				}
			}
		}
	}

	// Return the modified object
	return target;
};

jQuery.extend({
	// Unique for each copy of jQuery on the page
	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),

	// Assume jQuery is ready without the ready module
	isReady: true,

	error: function( msg ) {
		throw new Error( msg );
	},

	noop: function() {},

	isFunction: function( obj ) {
		return jQuery.type(obj) === "function";
	},

	isArray: Array.isArray,

	isWindow: function( obj ) {
		return obj != null && obj === obj.window;
	},

	isNumeric: function( obj ) {
		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
		// subtraction forces infinities to NaN
		// adding 1 corrects loss of precision from parseFloat (#15100)
		return !jQuery.isArray( obj ) && (obj - parseFloat( obj ) + 1) >= 0;
	},

	isPlainObject: function( obj ) {
		// Not plain objects:
		// - Any object or value whose internal [[Class]] property is not "[object Object]"
		// - DOM nodes
		// - window
		if ( jQuery.type( obj ) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
			return false;
		}

		if ( obj.constructor &&
				!hasOwn.call( obj.constructor.prototype, "isPrototypeOf" ) ) {
			return false;
		}

		// If the function hasn't returned already, we're confident that
		// |obj| is a plain object, created by {} or constructed with new Object
		return true;
	},

	isEmptyObject: function( obj ) {
		var name;
		for ( name in obj ) {
			return false;
		}
		return true;
	},

	type: function( obj ) {
		if ( obj == null ) {
			return obj + "";
		}
		// Support: Android<4.0, iOS<6 (functionish RegExp)
		return typeof obj === "object" || typeof obj === "function" ?
			class2type[ toString.call(obj) ] || "object" :
			typeof obj;
	},

	// Evaluates a script in a global context
	globalEval: function( code ) {
		var script,
			indirect = eval;

		code = jQuery.trim( code );

		if ( code ) {
			// If the code includes a valid, prologue position
			// strict mode pragma, execute code by injecting a
			// script tag into the document.
			if ( code.indexOf("use strict") === 1 ) {
				script = document.createElement("script");
				script.text = code;
				document.head.appendChild( script ).parentNode.removeChild( script );
			} else {
			// Otherwise, avoid the DOM node creation, insertion
			// and removal by using an indirect global eval
				indirect( code );
			}
		}
	},

	// Convert dashed to camelCase; used by the css and data modules
	// Support: IE9-11+
	// Microsoft forgot to hump their vendor prefix (#9572)
	camelCase: function( string ) {
		return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
	},

	nodeName: function( elem, name ) {
		return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
	},

	// args is for internal usage only
	each: function( obj, callback, args ) {
		var value,
			i = 0,
			length = obj.length,
			isArray = isArraylike( obj );

		if ( args ) {
			if ( isArray ) {
				for ( ; i < length; i++ ) {
					value = callback.apply( obj[ i ], args );

					if ( value === false ) {
						break;
					}
				}
			} else {
				for ( i in obj ) {
					value = callback.apply( obj[ i ], args );

					if ( value === false ) {
						break;
					}
				}
			}

		// A special, fast, case for the most common use of each
		} else {
			if ( isArray ) {
				for ( ; i < length; i++ ) {
					value = callback.call( obj[ i ], i, obj[ i ] );

					if ( value === false ) {
						break;
					}
				}
			} else {
				for ( i in obj ) {
					value = callback.call( obj[ i ], i, obj[ i ] );

					if ( value === false ) {
						break;
					}
				}
			}
		}

		return obj;
	},

	// Support: Android<4.1
	trim: function( text ) {
		return text == null ?
			"" :
			( text + "" ).replace( rtrim, "" );
	},

	// results is for internal usage only
	makeArray: function( arr, results ) {
		var ret = results || [];

		if ( arr != null ) {
			if ( isArraylike( Object(arr) ) ) {
				jQuery.merge( ret,
					typeof arr === "string" ?
					[ arr ] : arr
				);
			} else {
				push.call( ret, arr );
			}
		}

		return ret;
	},

	inArray: function( elem, arr, i ) {
		return arr == null ? -1 : indexOf.call( arr, elem, i );
	},

	merge: function( first, second ) {
		var len = +second.length,
			j = 0,
			i = first.length;

		for ( ; j < len; j++ ) {
			first[ i++ ] = second[ j ];
		}

		first.length = i;

		return first;
	},

	grep: function( elems, callback, invert ) {
		var callbackInverse,
			matches = [],
			i = 0,
			length = elems.length,
			callbackExpect = !invert;

		// Go through the array, only saving the items
		// that pass the validator function
		for ( ; i < length; i++ ) {
			callbackInverse = !callback( elems[ i ], i );
			if ( callbackInverse !== callbackExpect ) {
				matches.push( elems[ i ] );
			}
		}

		return matches;
	},

	// arg is for internal usage only
	map: function( elems, callback, arg ) {
		var value,
			i = 0,
			length = elems.length,
			isArray = isArraylike( elems ),
			ret = [];

		// Go through the array, translating each of the items to their new values
		if ( isArray ) {
			for ( ; i < length; i++ ) {
				value = callback( elems[ i ], i, arg );

				if ( value != null ) {
					ret.push( value );
				}
			}

		// Go through every key on the object,
		} else {
			for ( i in elems ) {
				value = callback( elems[ i ], i, arg );

				if ( value != null ) {
					ret.push( value );
				}
			}
		}

		// Flatten any nested arrays
		return concat.apply( [], ret );
	},

	// A global GUID counter for objects
	guid: 1,

	// Bind a function to a context, optionally partially applying any
	// arguments.
	proxy: function( fn, context ) {
		var tmp, args, proxy;

		if ( typeof context === "string" ) {
			tmp = fn[ context ];
			context = fn;
			fn = tmp;
		}

		// Quick check to determine if target is callable, in the spec
		// this throws a TypeError, but we will just return undefined.
		if ( !jQuery.isFunction( fn ) ) {
			return undefined;
		}

		// Simulated bind
		args = slice.call( arguments, 2 );
		proxy = function() {
			return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
		};

		// Set the guid of unique handler to the same of original handler, so it can be removed
		proxy.guid = fn.guid = fn.guid || jQuery.guid++;

		return proxy;
	},

	now: Date.now,

	// jQuery.support is not used in Core but other projects attach their
	// properties to it so it needs to exist.
	support: support
});

// Populate the class2type map
jQuery.each("Boolean Number String Function Array Date RegExp Object Error".split(" "), function(i, name) {
	class2type[ "[object " + name + "]" ] = name.toLowerCase();
});

function isArraylike( obj ) {
	var length = obj.length,
		type = jQuery.type( obj );

	if ( type === "function" || jQuery.isWindow( obj ) ) {
		return false;
	}

	if ( obj.nodeType === 1 && length ) {
		return true;
	}

	return type === "array" || length === 0 ||
		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
}
var Sizzle =
/*!
 * Sizzle CSS Selector Engine v2.2.0-pre
 * http://sizzlejs.com/
 *
 * Copyright 2008, 2014 jQuery Foundation, Inc. and other contributors
 * Released under the MIT license
 * http://jquery.org/license
 *
 * Date: 2014-12-16
 */
(function( window ) {

var i,
	support,
	Expr,
	getText,
	isXML,
	tokenize,
	compile,
	select,
	outermostContext,
	sortInput,
	hasDuplicate,

	// Local document vars
	setDocument,
	document,
	docElem,
	documentIsHTML,
	rbuggyQSA,
	rbuggyMatches,
	matches,
	contains,

	// Instance-specific data
	expando = "sizzle" + 1 * new Date(),
	preferredDoc = window.document,
	dirruns = 0,
	done = 0,
	classCache = createCache(),
	tokenCache = createCache(),
	compilerCache = createCache(),
	sortOrder = function( a, b ) {
		if ( a === b ) {
			hasDuplicate = true;
		}
		return 0;
	},

	// General-purpose constants
	MAX_NEGATIVE = 1 << 31,

	// Instance methods
	hasOwn = ({}).hasOwnProperty,
	arr = [],
	pop = arr.pop,
	push_native = arr.push,
	push = arr.push,
	slice = arr.slice,
	// Use a stripped-down indexOf as it's faster than native
	// http://jsperf.com/thor-indexof-vs-for/5
	indexOf = function( list, elem ) {
		var i = 0,
			len = list.length;
		for ( ; i < len; i++ ) {
			if ( list[i] === elem ) {
				return i;
			}
		}
		return -1;
	},

	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",

	// Regular expressions

	// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
	whitespace = "[\\x20\\t\\r\\n\\f]",
	// http://www.w3.org/TR/css3-syntax/#characters
	characterEncoding = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",

	// Loosely modeled on CSS identifier characters
	// An unquoted value should be a CSS identifier http://www.w3.org/TR/css3-selectors/#attribute-selectors
	// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
	identifier = characterEncoding.replace( "w", "w#" ),

	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")(?:" + whitespace +
		// Operator (capture 2)
		"*([*^$|!~]?=)" + whitespace +
		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
		"*\\]",

	pseudos = ":(" + characterEncoding + ")(?:\\((" +
		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
		// 1. quoted (capture 3; capture 4 or capture 5)
		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
		// 2. simple (capture 6)
		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
		// 3. anything else (capture 2)
		".*" +
		")\\)|)",

	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
	rwhitespace = new RegExp( whitespace + "+", "g" ),
	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),

	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),

	rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),

	rpseudo = new RegExp( pseudos ),
	ridentifier = new RegExp( "^" + identifier + "$" ),

	matchExpr = {
		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
		"ATTR": new RegExp( "^" + attributes ),
		"PSEUDO": new RegExp( "^" + pseudos ),
		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
		// For use in libraries implementing .is()
		// We use this for POS matching in `select`
		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
	},

	rinputs = /^(?:input|select|textarea|button)$/i,
	rheader = /^h\d$/i,

	rnative = /^[^{]+\{\s*\[native \w/,

	// Easily-parseable/retrievable ID or TAG or CLASS selectors
	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,

	rsibling = /[+~]/,
	rescape = /'|\\/g,

	// CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
	funescape = function( _, escaped, escapedWhitespace ) {
		var high = "0x" + escaped - 0x10000;
		// NaN means non-codepoint
		// Support: Firefox<24
		// Workaround erroneous numeric interpretation of +"0x"
		return high !== high || escapedWhitespace ?
			escaped :
			high < 0 ?
				// BMP codepoint
				String.fromCharCode( high + 0x10000 ) :
				// Supplemental Plane codepoint (surrogate pair)
				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
	},

	// Used for iframes
	// See setDocument()
	// Removing the function wrapper causes a "Permission Denied"
	// error in IE
	unloadHandler = function() {
		setDocument();
	};

// Optimize for push.apply( _, NodeList )
try {
	push.apply(
		(arr = slice.call( preferredDoc.childNodes )),
		preferredDoc.childNodes
	);
	// Support: Android<4.0
	// Detect silently failing push.apply
	arr[ preferredDoc.childNodes.length ].nodeType;
} catch ( e ) {
	push = { apply: arr.length ?

		// Leverage slice if possible
		function( target, els ) {
			push_native.apply( target, slice.call(els) );
		} :

		// Support: IE<9
		// Otherwise append directly
		function( target, els ) {
			var j = target.length,
				i = 0;
			// Can't trust NodeList.length
			while ( (target[j++] = els[i++]) ) {}
			target.length = j - 1;
		}
	};
}

function Sizzle( selector, context, results, seed ) {
	var match, elem, m, nodeType,
		// QSA vars
		i, groups, old, nid, newContext, newSelector;

	if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
		setDocument( context );
	}

	context = context || document;
	results = results || [];
	nodeType = context.nodeType;

	if ( typeof selector !== "string" || !selector ||
		nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {

		return results;
	}

	if ( !seed && documentIsHTML ) {

		// Try to shortcut find operations when possible (e.g., not under DocumentFragment)
		if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
			// Speed-up: Sizzle("#ID")
			if ( (m = match[1]) ) {
				if ( nodeType === 9 ) {
					elem = context.getElementById( m );
					// Check parentNode to catch when Blackberry 4.6 returns
					// nodes that are no longer in the document (jQuery #6963)
					if ( elem && elem.parentNode ) {
						// Handle the case where IE, Opera, and Webkit return items
						// by name instead of ID
						if ( elem.id === m ) {
							results.push( elem );
							return results;
						}
					} else {
						return results;
					}
				} else {
					// Context is not a document
					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
						contains( context, elem ) && elem.id === m ) {
						results.push( elem );
						return results;
					}
				}

			// Speed-up: Sizzle("TAG")
			} else if ( match[2] ) {
				push.apply( results, context.getElementsByTagName( selector ) );
				return results;

			// Speed-up: Sizzle(".CLASS")
			} else if ( (m = match[3]) && support.getElementsByClassName ) {
				push.apply( results, context.getElementsByClassName( m ) );
				return results;
			}
		}

		// QSA path
		if ( support.qsa && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
			nid = old = expando;
			newContext = context;
			newSelector = nodeType !== 1 && selector;

			// qSA works strangely on Element-rooted queries
			// We can work around this by specifying an extra ID on the root
			// and working up from there (Thanks to Andrew Dupont for the technique)
			// IE 8 doesn't work on object elements
			if ( nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
				groups = tokenize( selector );

				if ( (old = context.getAttribute("id")) ) {
					nid = old.replace( rescape, "\\$&" );
				} else {
					context.setAttribute( "id", nid );
				}
				nid = "[id='" + nid + "'] ";

				i = groups.length;
				while ( i-- ) {
					groups[i] = nid + toSelector( groups[i] );
				}
				newContext = rsibling.test( selector ) && testContext( context.parentNode ) || context;
				newSelector = groups.join(",");
			}

			if ( newSelector ) {
				try {
					push.apply( results,
						newContext.querySelectorAll( newSelector )
					);
					return results;
				} catch(qsaError) {
				} finally {
					if ( !old ) {
						context.removeAttribute("id");
					}
				}
			}
		}
	}

	// All others
	return select( selector.replace( rtrim, "$1" ), context, results, seed );
}

/**
 * Create key-value caches of limited size
 * @returns {Function(string, Object)} Returns the Object data after storing it on itself with
 *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
 *	deleting the oldest entry
 */
function createCache() {
	var keys = [];

	function cache( key, value ) {
		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
		if ( keys.push( key + " " ) > Expr.cacheLength ) {
			// Only keep the most recent entries
			delete cache[ keys.shift() ];
		}
		return (cache[ key + " " ] = value);
	}
	return cache;
}

/**
 * Mark a function for special use by Sizzle
 * @param {Function} fn The function to mark
 */
function markFunction( fn ) {
	fn[ expando ] = true;
	return fn;
}

/**
 * Support testing using an element
 * @param {Function} fn Passed the created div and expects a boolean result
 */
function assert( fn ) {
	var div = document.createElement("div");

	try {
		return !!fn( div );
	} catch (e) {
		return false;
	} finally {
		// Remove from its parent by default
		if ( div.parentNode ) {
			div.parentNode.removeChild( div );
		}
		// release memory in IE
		div = null;
	}
}

/**
 * Adds the same handler for all of the specified attrs
 * @param {String} attrs Pipe-separated list of attributes
 * @param {Function} handler The method that will be applied
 */
function addHandle( attrs, handler ) {
	var arr = attrs.split("|"),
		i = attrs.length;

	while ( i-- ) {
		Expr.attrHandle[ arr[i] ] = handler;
	}
}

/**
 * Checks document order of two siblings
 * @param {Element} a
 * @param {Element} b
 * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
 */
function siblingCheck( a, b ) {
	var cur = b && a,
		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
			( ~b.sourceIndex || MAX_NEGATIVE ) -
			( ~a.sourceIndex || MAX_NEGATIVE );

	// Use IE sourceIndex if available on both nodes
	if ( diff ) {
		return diff;
	}

	// Check if b follows a
	if ( cur ) {
		while ( (cur = cur.nextSibling) ) {
			if ( cur === b ) {
				return -1;
			}
		}
	}

	return a ? 1 : -1;
}

/**
 * Returns a function to use in pseudos for input types
 * @param {String} type
 */
function createInputPseudo( type ) {
	return function( elem ) {
		var name = elem.nodeName.toLowerCase();
		return name === "input" && elem.type === type;
	};
}

/**
 * Returns a function to use in pseudos for buttons
 * @param {String} type
 */
function createButtonPseudo( type ) {
	return function( elem ) {
		var name = elem.nodeName.toLowerCase();
		return (name === "input" || name === "button") && elem.type === type;
	};
}

/**
 * Returns a function to use in pseudos for positionals
 * @param {Function} fn
 */
function createPositionalPseudo( fn ) {
	return markFunction(function( argument ) {
		argument = +argument;
		return markFunction(function( seed, matches ) {
			var j,
				matchIndexes = fn( [], seed.length, argument ),
				i = matchIndexes.length;

			// Match elements found at the specified indexes
			while ( i-- ) {
				if ( seed[ (j = matchIndexes[i]) ] ) {
					seed[j] = !(matches[j] = seed[j]);
				}
			}
		});
	});
}

/**
 * Checks a node for validity as a Sizzle context
 * @param {Element|Object=} context
 * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
 */
function testContext( context ) {
	return context && typeof context.getElementsByTagName !== "undefined" && context;
}

// Expose support vars for convenience
support = Sizzle.support = {};

/**
 * Detects XML nodes
 * @param {Element|Object} elem An element or a document
 * @returns {Boolean} True iff elem is a non-HTML XML node
 */
isXML = Sizzle.isXML = function( elem ) {
	// documentElement is verified for cases where it doesn't yet exist
	// (such as loading iframes in IE - #4833)
	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
	return documentElement ? documentElement.nodeName !== "HTML" : false;
};

/**
 * Sets document-related variables once based on the current document
 * @param {Element|Object} [doc] An element or document object to use to set the document
 * @returns {Object} Returns the current document
 */
setDocument = Sizzle.setDocument = function( node ) {
	var hasCompare, parent,
		doc = node ? node.ownerDocument || node : preferredDoc;

	// If no document and documentElement is available, return
	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
		return document;
	}

	// Set our document
	document = doc;
	docElem = doc.documentElement;
	parent = doc.defaultView;

	// Support: IE>8
	// If iframe document is assigned to "document" variable and if iframe has been reloaded,
	// IE will throw "permission denied" error when accessing "document" variable, see jQuery #13936
	// IE6-8 do not support the defaultView property so parent will be undefined
	if ( parent && parent !== parent.top ) {
		// IE11 does not have attachEvent, so all must suffer
		if ( parent.addEventListener ) {
			parent.addEventListener( "unload", unloadHandler, false );
		} else if ( parent.attachEvent ) {
			parent.attachEvent( "onunload", unloadHandler );
		}
	}

	/* Support tests
	---------------------------------------------------------------------- */
	documentIsHTML = !isXML( doc );

	/* Attributes
	---------------------------------------------------------------------- */

	// Support: IE<8
	// Verify that getAttribute really returns attributes and not properties
	// (excepting IE8 booleans)
	support.attributes = assert(function( div ) {
		div.className = "i";
		return !div.getAttribute("className");
	});

	/* getElement(s)By*
	---------------------------------------------------------------------- */

	// Check if getElementsByTagName("*") returns only elements
	support.getElementsByTagName = assert(function( div ) {
		div.appendChild( doc.createComment("") );
		return !div.getElementsByTagName("*").length;
	});

	// Support: IE<9
	support.getElementsByClassName = rnative.test( doc.getElementsByClassName );

	// Support: IE<10
	// Check if getElementById returns elements by name
	// The broken getElementById methods don't pick up programatically-set names,
	// so use a roundabout getElementsByName test
	support.getById = assert(function( div ) {
		docElem.appendChild( div ).id = expando;
		return !doc.getElementsByName || !doc.getElementsByName( expando ).length;
	});

	// ID find and filter
	if ( support.getById ) {
		Expr.find["ID"] = function( id, context ) {
			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
				var m = context.getElementById( id );
				// Check parentNode to catch when Blackberry 4.6 returns
				// nodes that are no longer in the document #6963
				return m && m.parentNode ? [ m ] : [];
			}
		};
		Expr.filter["ID"] = function( id ) {
			var attrId = id.replace( runescape, funescape );
			return function( elem ) {
				return elem.getAttribute("id") === attrId;
			};
		};
	} else {
		// Support: IE6/7
		// getElementById is not reliable as a find shortcut
		delete Expr.find["ID"];

		Expr.filter["ID"] =  function( id ) {
			var attrId = id.replace( runescape, funescape );
			return function( elem ) {
				var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
				return node && node.value === attrId;
			};
		};
	}

	// Tag
	Expr.find["TAG"] = support.getElementsByTagName ?
		function( tag, context ) {
			if ( typeof context.getElementsByTagName !== "undefined" ) {
				return context.getElementsByTagName( tag );

			// DocumentFragment nodes don't have gEBTN
			} else if ( support.qsa ) {
				return context.querySelectorAll( tag );
			}
		} :

		function( tag, context ) {
			var elem,
				tmp = [],
				i = 0,
				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
				results = context.getElementsByTagName( tag );

			// Filter out possible comments
			if ( tag === "*" ) {
				while ( (elem = results[i++]) ) {
					if ( elem.nodeType === 1 ) {
						tmp.push( elem );
					}
				}

				return tmp;
			}
			return results;
		};

	// Class
	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
		if ( documentIsHTML ) {
			return context.getElementsByClassName( className );
		}
	};

	/* QSA/matchesSelector
	---------------------------------------------------------------------- */

	// QSA and matchesSelector support

	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
	rbuggyMatches = [];

	// qSa(:focus) reports false when true (Chrome 21)
	// We allow this because of a bug in IE8/9 that throws an error
	// whenever `document.activeElement` is accessed on an iframe
	// So, we allow :focus to pass through QSA all the time to avoid the IE error
	// See http://bugs.jquery.com/ticket/13378
	rbuggyQSA = [];

	if ( (support.qsa = rnative.test( doc.querySelectorAll )) ) {
		// Build QSA regex
		// Regex strategy adopted from Diego Perini
		assert(function( div ) {
			// Select is set to empty string on purpose
			// This is to test IE's treatment of not explicitly
			// setting a boolean content attribute,
			// since its presence should be enough
			// http://bugs.jquery.com/ticket/12359
			docElem.appendChild( div ).innerHTML = "<a id='" + expando + "'></a>" +
				"<select id='" + expando + "-\f]' msallowcapture=''>" +
				"<option selected=''></option></select>";

			// Support: IE8, Opera 11-12.16
			// Nothing should be selected when empty strings follow ^= or $= or *=
			// The test attribute must be unknown in Opera but "safe" for WinRT
			// http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
			if ( div.querySelectorAll("[msallowcapture^='']").length ) {
				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
			}

			// Support: IE8
			// Boolean attributes and "value" are not treated correctly
			if ( !div.querySelectorAll("[selected]").length ) {
				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
			}

			// Support: Chrome<29, Android<4.2+, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.7+
			if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
				rbuggyQSA.push("~=");
			}

			// Webkit/Opera - :checked should return selected option elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			// IE8 throws error here and will not see later tests
			if ( !div.querySelectorAll(":checked").length ) {
				rbuggyQSA.push(":checked");
			}

			// Support: Safari 8+, iOS 8+
			// https://bugs.webkit.org/show_bug.cgi?id=136851
			// In-page `selector#id sibing-combinator selector` fails
			if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
				rbuggyQSA.push(".#.+[+~]");
			}
		});

		assert(function( div ) {
			// Support: Windows 8 Native Apps
			// The type and name attributes are restricted during .innerHTML assignment
			var input = doc.createElement("input");
			input.setAttribute( "type", "hidden" );
			div.appendChild( input ).setAttribute( "name", "D" );

			// Support: IE8
			// Enforce case-sensitivity of name attribute
			if ( div.querySelectorAll("[name=d]").length ) {
				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
			}

			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
			// IE8 throws error here and will not see later tests
			if ( !div.querySelectorAll(":enabled").length ) {
				rbuggyQSA.push( ":enabled", ":disabled" );
			}

			// Opera 10-11 does not throw on post-comma invalid pseudos
			div.querySelectorAll("*,:x");
			rbuggyQSA.push(",.*:");
		});
	}

	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
		docElem.webkitMatchesSelector ||
		docElem.mozMatchesSelector ||
		docElem.oMatchesSelector ||
		docElem.msMatchesSelector) )) ) {

		assert(function( div ) {
			// Check to see if it's possible to do matchesSelector
			// on a disconnected node (IE 9)
			support.disconnectedMatch = matches.call( div, "div" );

			// This should fail with an exception
			// Gecko does not error, returns false instead
			matches.call( div, "[s!='']:x" );
			rbuggyMatches.push( "!=", pseudos );
		});
	}

	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );

	/* Contains
	---------------------------------------------------------------------- */
	hasCompare = rnative.test( docElem.compareDocumentPosition );

	// Element contains another
	// Purposefully does not implement inclusive descendent
	// As in, an element does not contain itself
	contains = hasCompare || rnative.test( docElem.contains ) ?
		function( a, b ) {
			var adown = a.nodeType === 9 ? a.documentElement : a,
				bup = b && b.parentNode;
			return a === bup || !!( bup && bup.nodeType === 1 && (
				adown.contains ?
					adown.contains( bup ) :
					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
			));
		} :
		function( a, b ) {
			if ( b ) {
				while ( (b = b.parentNode) ) {
					if ( b === a ) {
						return true;
					}
				}
			}
			return false;
		};

	/* Sorting
	---------------------------------------------------------------------- */

	// Document order sorting
	sortOrder = hasCompare ?
	function( a, b ) {

		// Flag for duplicate removal
		if ( a === b ) {
			hasDuplicate = true;
			return 0;
		}

		// Sort on method existence if only one input has compareDocumentPosition
		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
		if ( compare ) {
			return compare;
		}

		// Calculate position if both inputs belong to the same document
		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
			a.compareDocumentPosition( b ) :

			// Otherwise we know they are disconnected
			1;

		// Disconnected nodes
		if ( compare & 1 ||
			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {

			// Choose the first element that is related to our preferred document
			if ( a === doc || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
				return -1;
			}
			if ( b === doc || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
				return 1;
			}

			// Maintain original order
			return sortInput ?
				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
				0;
		}

		return compare & 4 ? -1 : 1;
	} :
	function( a, b ) {
		// Exit early if the nodes are identical
		if ( a === b ) {
			hasDuplicate = true;
			return 0;
		}

		var cur,
			i = 0,
			aup = a.parentNode,
			bup = b.parentNode,
			ap = [ a ],
			bp = [ b ];

		// Parentless nodes are either documents or disconnected
		if ( !aup || !bup ) {
			return a === doc ? -1 :
				b === doc ? 1 :
				aup ? -1 :
				bup ? 1 :
				sortInput ?
				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
				0;

		// If the nodes are siblings, we can do a quick check
		} else if ( aup === bup ) {
			return siblingCheck( a, b );
		}

		// Otherwise we need full lists of their ancestors for comparison
		cur = a;
		while ( (cur = cur.parentNode) ) {
			ap.unshift( cur );
		}
		cur = b;
		while ( (cur = cur.parentNode) ) {
			bp.unshift( cur );
		}

		// Walk down the tree looking for a discrepancy
		while ( ap[i] === bp[i] ) {
			i++;
		}

		return i ?
			// Do a sibling check if the nodes have a common ancestor
			siblingCheck( ap[i], bp[i] ) :

			// Otherwise nodes in our document sort first
			ap[i] === preferredDoc ? -1 :
			bp[i] === preferredDoc ? 1 :
			0;
	};

	return doc;
};

Sizzle.matches = function( expr, elements ) {
	return Sizzle( expr, null, null, elements );
};

Sizzle.matchesSelector = function( elem, expr ) {
	// Set document vars if needed
	if ( ( elem.ownerDocument || elem ) !== document ) {
		setDocument( elem );
	}

	// Make sure that attribute selectors are quoted
	expr = expr.replace( rattributeQuotes, "='$1']" );

	if ( support.matchesSelector && documentIsHTML &&
		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {

		try {
			var ret = matches.call( elem, expr );

			// IE 9's matchesSelector returns false on disconnected nodes
			if ( ret || support.disconnectedMatch ||
					// As well, disconnected nodes are said to be in a document
					// fragment in IE 9
					elem.document && elem.document.nodeType !== 11 ) {
				return ret;
			}
		} catch (e) {}
	}

	return Sizzle( expr, document, null, [ elem ] ).length > 0;
};

Sizzle.contains = function( context, elem ) {
	// Set document vars if needed
	if ( ( context.ownerDocument || context ) !== document ) {
		setDocument( context );
	}
	return contains( context, elem );
};

Sizzle.attr = function( elem, name ) {
	// Set document vars if needed
	if ( ( elem.ownerDocument || elem ) !== document ) {
		setDocument( elem );
	}

	var fn = Expr.attrHandle[ name.toLowerCase() ],
		// Don't get fooled by Object.prototype properties (jQuery #13807)
		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
			fn( elem, name, !documentIsHTML ) :
			undefined;

	return val !== undefined ?
		val :
		support.attributes || !documentIsHTML ?
			elem.getAttribute( name ) :
			(val = elem.getAttributeNode(name)) && val.specified ?
				val.value :
				null;
};

Sizzle.error = function( msg ) {
	throw new Error( "Syntax error, unrecognized expression: " + msg );
};

/**
 * Document sorting and removing duplicates
 * @param {ArrayLike} results
 */
Sizzle.uniqueSort = function( results ) {
	var elem,
		duplicates = [],
		j = 0,
		i = 0;

	// Unless we *know* we can detect duplicates, assume their presence
	hasDuplicate = !support.detectDuplicates;
	sortInput = !support.sortStable && results.slice( 0 );
	results.sort( sortOrder );

	if ( hasDuplicate ) {
		while ( (elem = results[i++]) ) {
			if ( elem === results[ i ] ) {
				j = duplicates.push( i );
			}
		}
		while ( j-- ) {
			results.splice( duplicates[ j ], 1 );
		}
	}

	// Clear input after sorting to release objects
	// See https://github.com/jquery/sizzle/pull/225
	sortInput = null;

	return results;
};

/**
 * Utility function for retrieving the text value of an array of DOM nodes
 * @param {Array|Element} elem
 */
getText = Sizzle.getText = function( elem ) {
	var node,
		ret = "",
		i = 0,
		nodeType = elem.nodeType;

	if ( !nodeType ) {
		// If no nodeType, this is expected to be an array
		while ( (node = elem[i++]) ) {
			// Do not traverse comment nodes
			ret += getText( node );
		}
	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
		// Use textContent for elements
		// innerText usage removed for consistency of new lines (jQuery #11153)
		if ( typeof elem.textContent === "string" ) {
			return elem.textContent;
		} else {
			// Traverse its children
			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
				ret += getText( elem );
			}
		}
	} else if ( nodeType === 3 || nodeType === 4 ) {
		return elem.nodeValue;
	}
	// Do not include comment or processing instruction nodes

	return ret;
};

Expr = Sizzle.selectors = {

	// Can be adjusted by the user
	cacheLength: 50,

	createPseudo: markFunction,

	match: matchExpr,

	attrHandle: {},

	find: {},

	relative: {
		">": { dir: "parentNode", first: true },
		" ": { dir: "parentNode" },
		"+": { dir: "previousSibling", first: true },
		"~": { dir: "previousSibling" }
	},

	preFilter: {
		"ATTR": function( match ) {
			match[1] = match[1].replace( runescape, funescape );

			// Move the given value to match[3] whether quoted or unquoted
			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );

			if ( match[2] === "~=" ) {
				match[3] = " " + match[3] + " ";
			}

			return match.slice( 0, 4 );
		},

		"CHILD": function( match ) {
			/* matches from matchExpr["CHILD"]
				1 type (only|nth|...)
				2 what (child|of-type)
				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
				4 xn-component of xn+y argument ([+-]?\d*n|)
				5 sign of xn-component
				6 x of xn-component
				7 sign of y-component
				8 y of y-component
			*/
			match[1] = match[1].toLowerCase();

			if ( match[1].slice( 0, 3 ) === "nth" ) {
				// nth-* requires argument
				if ( !match[3] ) {
					Sizzle.error( match[0] );
				}

				// numeric x and y parameters for Expr.filter.CHILD
				// remember that false/true cast respectively to 0/1
				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );

			// other types prohibit arguments
			} else if ( match[3] ) {
				Sizzle.error( match[0] );
			}

			return match;
		},

		"PSEUDO": function( match ) {
			var excess,
				unquoted = !match[6] && match[2];

			if ( matchExpr["CHILD"].test( match[0] ) ) {
				return null;
			}

			// Accept quoted arguments as-is
			if ( match[3] ) {
				match[2] = match[4] || match[5] || "";

			// Strip excess characters from unquoted arguments
			} else if ( unquoted && rpseudo.test( unquoted ) &&
				// Get excess from tokenize (recursively)
				(excess = tokenize( unquoted, true )) &&
				// advance to the next closing parenthesis
				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {

				// excess is a negative index
				match[0] = match[0].slice( 0, excess );
				match[2] = unquoted.slice( 0, excess );
			}

			// Return only captures needed by the pseudo filter method (type and argument)
			return match.slice( 0, 3 );
		}
	},

	filter: {

		"TAG": function( nodeNameSelector ) {
			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
			return nodeNameSelector === "*" ?
				function() { return true; } :
				function( elem ) {
					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
				};
		},

		"CLASS": function( className ) {
			var pattern = classCache[ className + " " ];

			return pattern ||
				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
				classCache( className, function( elem ) {
					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
				});
		},

		"ATTR": function( name, operator, check ) {
			return function( elem ) {
				var result = Sizzle.attr( elem, name );

				if ( result == null ) {
					return operator === "!=";
				}
				if ( !operator ) {
					return true;
				}

				result += "";

				return operator === "=" ? result === check :
					operator === "!=" ? result !== check :
					operator === "^=" ? check && result.indexOf( check ) === 0 :
					operator === "*=" ? check && result.indexOf( check ) > -1 :
					operator === "$=" ? check && result.slice( -check.length ) === check :
					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
					false;
			};
		},

		"CHILD": function( type, what, argument, first, last ) {
			var simple = type.slice( 0, 3 ) !== "nth",
				forward = type.slice( -4 ) !== "last",
				ofType = what === "of-type";

			return first === 1 && last === 0 ?

				// Shortcut for :nth-*(n)
				function( elem ) {
					return !!elem.parentNode;
				} :

				function( elem, context, xml ) {
					var cache, outerCache, node, diff, nodeIndex, start,
						dir = simple !== forward ? "nextSibling" : "previousSibling",
						parent = elem.parentNode,
						name = ofType && elem.nodeName.toLowerCase(),
						useCache = !xml && !ofType;

					if ( parent ) {

						// :(first|last|only)-(child|of-type)
						if ( simple ) {
							while ( dir ) {
								node = elem;
								while ( (node = node[ dir ]) ) {
									if ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) {
										return false;
									}
								}
								// Reverse direction for :only-* (if we haven't yet done so)
								start = dir = type === "only" && !start && "nextSibling";
							}
							return true;
						}

						start = [ forward ? parent.firstChild : parent.lastChild ];

						// non-xml :nth-child(...) stores cache data on `parent`
						if ( forward && useCache ) {
							// Seek `elem` from a previously-cached index
							outerCache = parent[ expando ] || (parent[ expando ] = {});
							cache = outerCache[ type ] || [];
							nodeIndex = cache[0] === dirruns && cache[1];
							diff = cache[0] === dirruns && cache[2];
							node = nodeIndex && parent.childNodes[ nodeIndex ];

							while ( (node = ++nodeIndex && node && node[ dir ] ||

								// Fallback to seeking `elem` from the start
								(diff = nodeIndex = 0) || start.pop()) ) {

								// When found, cache indexes on `parent` and break
								if ( node.nodeType === 1 && ++diff && node === elem ) {
									outerCache[ type ] = [ dirruns, nodeIndex, diff ];
									break;
								}
							}

						// Use previously-cached element index if available
						} else if ( useCache && (cache = (elem[ expando ] || (elem[ expando ] = {}))[ type ]) && cache[0] === dirruns ) {
							diff = cache[1];

						// xml :nth-child(...) or :nth-last-child(...) or :nth(-last)?-of-type(...)
						} else {
							// Use the same loop as above to seek `elem` from the start
							while ( (node = ++nodeIndex && node && node[ dir ] ||
								(diff = nodeIndex = 0) || start.pop()) ) {

								if ( ( ofType ? node.nodeName.toLowerCase() === name : node.nodeType === 1 ) && ++diff ) {
									// Cache the index of each encountered element
									if ( useCache ) {
										(node[ expando ] || (node[ expando ] = {}))[ type ] = [ dirruns, diff ];
									}

									if ( node === elem ) {
										break;
									}
								}
							}
						}

						// Incorporate the offset, then check against cycle size
						diff -= last;
						return diff === first || ( diff % first === 0 && diff / first >= 0 );
					}
				};
		},

		"PSEUDO": function( pseudo, argument ) {
			// pseudo-class names are case-insensitive
			// http://www.w3.org/TR/selectors/#pseudo-classes
			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
			// Remember that setFilters inherits from pseudos
			var args,
				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
					Sizzle.error( "unsupported pseudo: " + pseudo );

			// The user may use createPseudo to indicate that
			// arguments are needed to create the filter function
			// just as Sizzle does
			if ( fn[ expando ] ) {
				return fn( argument );
			}

			// But maintain support for old signatures
			if ( fn.length > 1 ) {
				args = [ pseudo, pseudo, "", argument ];
				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
					markFunction(function( seed, matches ) {
						var idx,
							matched = fn( seed, argument ),
							i = matched.length;
						while ( i-- ) {
							idx = indexOf( seed, matched[i] );
							seed[ idx ] = !( matches[ idx ] = matched[i] );
						}
					}) :
					function( elem ) {
						return fn( elem, 0, args );
					};
			}

			return fn;
		}
	},

	pseudos: {
		// Potentially complex pseudos
		"not": markFunction(function( selector ) {
			// Trim the selector passed to compile
			// to avoid treating leading and trailing
			// spaces as combinators
			var input = [],
				results = [],
				matcher = compile( selector.replace( rtrim, "$1" ) );

			return matcher[ expando ] ?
				markFunction(function( seed, matches, context, xml ) {
					var elem,
						unmatched = matcher( seed, null, xml, [] ),
						i = seed.length;

					// Match elements unmatched by `matcher`
					while ( i-- ) {
						if ( (elem = unmatched[i]) ) {
							seed[i] = !(matches[i] = elem);
						}
					}
				}) :
				function( elem, context, xml ) {
					input[0] = elem;
					matcher( input, null, xml, results );
					// Don't keep the element (issue #299)
					input[0] = null;
					return !results.pop();
				};
		}),

		"has": markFunction(function( selector ) {
			return function( elem ) {
				return Sizzle( selector, elem ).length > 0;
			};
		}),

		"contains": markFunction(function( text ) {
			text = text.replace( runescape, funescape );
			return function( elem ) {
				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
			};
		}),

		// "Whether an element is represented by a :lang() selector
		// is based solely on the element's language value
		// being equal to the identifier C,
		// or beginning with the identifier C immediately followed by "-".
		// The matching of C against the element's language value is performed case-insensitively.
		// The identifier C does not have to be a valid language name."
		// http://www.w3.org/TR/selectors/#lang-pseudo
		"lang": markFunction( function( lang ) {
			// lang value must be a valid identifier
			if ( !ridentifier.test(lang || "") ) {
				Sizzle.error( "unsupported lang: " + lang );
			}
			lang = lang.replace( runescape, funescape ).toLowerCase();
			return function( elem ) {
				var elemLang;
				do {
					if ( (elemLang = documentIsHTML ?
						elem.lang :
						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {

						elemLang = elemLang.toLowerCase();
						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
					}
				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
				return false;
			};
		}),

		// Miscellaneous
		"target": function( elem ) {
			var hash = window.location && window.location.hash;
			return hash && hash.slice( 1 ) === elem.id;
		},

		"root": function( elem ) {
			return elem === docElem;
		},

		"focus": function( elem ) {
			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
		},

		// Boolean properties
		"enabled": function( elem ) {
			return elem.disabled === false;
		},

		"disabled": function( elem ) {
			return elem.disabled === true;
		},

		"checked": function( elem ) {
			// In CSS3, :checked should return both checked and selected elements
			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
			var nodeName = elem.nodeName.toLowerCase();
			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
		},

		"selected": function( elem ) {
			// Accessing this property makes selected-by-default
			// options in Safari work properly
			if ( elem.parentNode ) {
				elem.parentNode.selectedIndex;
			}

			return elem.selected === true;
		},

		// Contents
		"empty": function( elem ) {
			// http://www.w3.org/TR/selectors/#empty-pseudo
			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
			//   but not by others (comment: 8; processing instruction: 7; etc.)
			// nodeType < 6 works because attributes (2) do not appear as children
			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
				if ( elem.nodeType < 6 ) {
					return false;
				}
			}
			return true;
		},

		"parent": function( elem ) {
			return !Expr.pseudos["empty"]( elem );
		},

		// Element/input types
		"header": function( elem ) {
			return rheader.test( elem.nodeName );
		},

		"input": function( elem ) {
			return rinputs.test( elem.nodeName );
		},

		"button": function( elem ) {
			var name = elem.nodeName.toLowerCase();
			return name === "input" && elem.type === "button" || name === "button";
		},

		"text": function( elem ) {
			var attr;
			return elem.nodeName.toLowerCase() === "input" &&
				elem.type === "text" &&

				// Support: IE<8
				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
		},

		// Position-in-collection
		"first": createPositionalPseudo(function() {
			return [ 0 ];
		}),

		"last": createPositionalPseudo(function( matchIndexes, length ) {
			return [ length - 1 ];
		}),

		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
			return [ argument < 0 ? argument + length : argument ];
		}),

		"even": createPositionalPseudo(function( matchIndexes, length ) {
			var i = 0;
			for ( ; i < length; i += 2 ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"odd": createPositionalPseudo(function( matchIndexes, length ) {
			var i = 1;
			for ( ; i < length; i += 2 ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
			var i = argument < 0 ? argument + length : argument;
			for ( ; --i >= 0; ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		}),

		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
			var i = argument < 0 ? argument + length : argument;
			for ( ; ++i < length; ) {
				matchIndexes.push( i );
			}
			return matchIndexes;
		})
	}
};

Expr.pseudos["nth"] = Expr.pseudos["eq"];

// Add button/input type pseudos
for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
	Expr.pseudos[ i ] = createInputPseudo( i );
}
for ( i in { submit: true, reset: true } ) {
	Expr.pseudos[ i ] = createButtonPseudo( i );
}

// Easy API for creating new setFilters
function setFilters() {}
setFilters.prototype = Expr.filters = Expr.pseudos;
Expr.setFilters = new setFilters();

tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
	var matched, match, tokens, type,
		soFar, groups, preFilters,
		cached = tokenCache[ selector + " " ];

	if ( cached ) {
		return parseOnly ? 0 : cached.slice( 0 );
	}

	soFar = selector;
	groups = [];
	preFilters = Expr.preFilter;

	while ( soFar ) {

		// Comma and first run
		if ( !matched || (match = rcomma.exec( soFar )) ) {
			if ( match ) {
				// Don't consume trailing commas as valid
				soFar = soFar.slice( match[0].length ) || soFar;
			}
			groups.push( (tokens = []) );
		}

		matched = false;

		// Combinators
		if ( (match = rcombinators.exec( soFar )) ) {
			matched = match.shift();
			tokens.push({
				value: matched,
				// Cast descendant combinators to space
				type: match[0].replace( rtrim, " " )
			});
			soFar = soFar.slice( matched.length );
		}

		// Filters
		for ( type in Expr.filter ) {
			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
				(match = preFilters[ type ]( match ))) ) {
				matched = match.shift();
				tokens.push({
					value: matched,
					type: type,
					matches: match
				});
				soFar = soFar.slice( matched.length );
			}
		}

		if ( !matched ) {
			break;
		}
	}

	// Return the length of the invalid excess
	// if we're just parsing
	// Otherwise, throw an error or return tokens
	return parseOnly ?
		soFar.length :
		soFar ?
			Sizzle.error( selector ) :
			// Cache the tokens
			tokenCache( selector, groups ).slice( 0 );
};

function toSelector( tokens ) {
	var i = 0,
		len = tokens.length,
		selector = "";
	for ( ; i < len; i++ ) {
		selector += tokens[i].value;
	}
	return selector;
}

function addCombinator( matcher, combinator, base ) {
	var dir = combinator.dir,
		checkNonElements = base && dir === "parentNode",
		doneName = done++;

	return combinator.first ?
		// Check against closest ancestor/preceding element
		function( elem, context, xml ) {
			while ( (elem = elem[ dir ]) ) {
				if ( elem.nodeType === 1 || checkNonElements ) {
					return matcher( elem, context, xml );
				}
			}
		} :

		// Check against all ancestor/preceding elements
		function( elem, context, xml ) {
			var oldCache, outerCache,
				newCache = [ dirruns, doneName ];

			// We can't set arbitrary data on XML nodes, so they don't benefit from dir caching
			if ( xml ) {
				while ( (elem = elem[ dir ]) ) {
					if ( elem.nodeType === 1 || checkNonElements ) {
						if ( matcher( elem, context, xml ) ) {
							return true;
						}
					}
				}
			} else {
				while ( (elem = elem[ dir ]) ) {
					if ( elem.nodeType === 1 || checkNonElements ) {
						outerCache = elem[ expando ] || (elem[ expando ] = {});
						if ( (oldCache = outerCache[ dir ]) &&
							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {

							// Assign to newCache so results back-propagate to previous elements
							return (newCache[ 2 ] = oldCache[ 2 ]);
						} else {
							// Reuse newcache so results back-propagate to previous elements
							outerCache[ dir ] = newCache;

							// A match means we're done; a fail means we have to keep checking
							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
								return true;
							}
						}
					}
				}
			}
		};
}

function elementMatcher( matchers ) {
	return matchers.length > 1 ?
		function( elem, context, xml ) {
			var i = matchers.length;
			while ( i-- ) {
				if ( !matchers[i]( elem, context, xml ) ) {
					return false;
				}
			}
			return true;
		} :
		matchers[0];
}

function multipleContexts( selector, contexts, results ) {
	var i = 0,
		len = contexts.length;
	for ( ; i < len; i++ ) {
		Sizzle( selector, contexts[i], results );
	}
	return results;
}

function condense( unmatched, map, filter, context, xml ) {
	var elem,
		newUnmatched = [],
		i = 0,
		len = unmatched.length,
		mapped = map != null;

	for ( ; i < len; i++ ) {
		if ( (elem = unmatched[i]) ) {
			if ( !filter || filter( elem, context, xml ) ) {
				newUnmatched.push( elem );
				if ( mapped ) {
					map.push( i );
				}
			}
		}
	}

	return newUnmatched;
}

function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
	if ( postFilter && !postFilter[ expando ] ) {
		postFilter = setMatcher( postFilter );
	}
	if ( postFinder && !postFinder[ expando ] ) {
		postFinder = setMatcher( postFinder, postSelector );
	}
	return markFunction(function( seed, results, context, xml ) {
		var temp, i, elem,
			preMap = [],
			postMap = [],
			preexisting = results.length,

			// Get initial elements from seed or context
			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),

			// Prefilter to get matcher input, preserving a map for seed-results synchronization
			matcherIn = preFilter && ( seed || !selector ) ?
				condense( elems, preMap, preFilter, context, xml ) :
				elems,

			matcherOut = matcher ?
				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?

					// ...intermediate processing is necessary
					[] :

					// ...otherwise use results directly
					results :
				matcherIn;

		// Find primary matches
		if ( matcher ) {
			matcher( matcherIn, matcherOut, context, xml );
		}

		// Apply postFilter
		if ( postFilter ) {
			temp = condense( matcherOut, postMap );
			postFilter( temp, [], context, xml );

			// Un-match failing elements by moving them back to matcherIn
			i = temp.length;
			while ( i-- ) {
				if ( (elem = temp[i]) ) {
					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
				}
			}
		}

		if ( seed ) {
			if ( postFinder || preFilter ) {
				if ( postFinder ) {
					// Get the final matcherOut by condensing this intermediate into postFinder contexts
					temp = [];
					i = matcherOut.length;
					while ( i-- ) {
						if ( (elem = matcherOut[i]) ) {
							// Restore matcherIn since elem is not yet a final match
							temp.push( (matcherIn[i] = elem) );
						}
					}
					postFinder( null, (matcherOut = []), temp, xml );
				}

				// Move matched elements from seed to results to keep them synchronized
				i = matcherOut.length;
				while ( i-- ) {
					if ( (elem = matcherOut[i]) &&
						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {

						seed[temp] = !(results[temp] = elem);
					}
				}
			}

		// Add elements to results, through postFinder if defined
		} else {
			matcherOut = condense(
				matcherOut === results ?
					matcherOut.splice( preexisting, matcherOut.length ) :
					matcherOut
			);
			if ( postFinder ) {
				postFinder( null, results, matcherOut, xml );
			} else {
				push.apply( results, matcherOut );
			}
		}
	});
}

function matcherFromTokens( tokens ) {
	var checkContext, matcher, j,
		len = tokens.length,
		leadingRelative = Expr.relative[ tokens[0].type ],
		implicitRelative = leadingRelative || Expr.relative[" "],
		i = leadingRelative ? 1 : 0,

		// The foundational matcher ensures that elements are reachable from top-level context(s)
		matchContext = addCombinator( function( elem ) {
			return elem === checkContext;
		}, implicitRelative, true ),
		matchAnyContext = addCombinator( function( elem ) {
			return indexOf( checkContext, elem ) > -1;
		}, implicitRelative, true ),
		matchers = [ function( elem, context, xml ) {
			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
				(checkContext = context).nodeType ?
					matchContext( elem, context, xml ) :
					matchAnyContext( elem, context, xml ) );
			// Avoid hanging onto element (issue #299)
			checkContext = null;
			return ret;
		} ];

	for ( ; i < len; i++ ) {
		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
		} else {
			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );

			// Return special upon seeing a positional matcher
			if ( matcher[ expando ] ) {
				// Find the next relative operator (if any) for proper handling
				j = ++i;
				for ( ; j < len; j++ ) {
					if ( Expr.relative[ tokens[j].type ] ) {
						break;
					}
				}
				return setMatcher(
					i > 1 && elementMatcher( matchers ),
					i > 1 && toSelector(
						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
					).replace( rtrim, "$1" ),
					matcher,
					i < j && matcherFromTokens( tokens.slice( i, j ) ),
					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
					j < len && toSelector( tokens )
				);
			}
			matchers.push( matcher );
		}
	}

	return elementMatcher( matchers );
}

function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
	var bySet = setMatchers.length > 0,
		byElement = elementMatchers.length > 0,
		superMatcher = function( seed, context, xml, results, outermost ) {
			var elem, j, matcher,
				matchedCount = 0,
				i = "0",
				unmatched = seed && [],
				setMatched = [],
				contextBackup = outermostContext,
				// We must always have either seed elements or outermost context
				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
				// Use integer dirruns iff this is the outermost matcher
				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
				len = elems.length;

			if ( outermost ) {
				outermostContext = context !== document && context;
			}

			// Add elements passing elementMatchers directly to results
			// Keep `i` a string if there are no elements so `matchedCount` will be "00" below
			// Support: IE<9, Safari
			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
				if ( byElement && elem ) {
					j = 0;
					while ( (matcher = elementMatchers[j++]) ) {
						if ( matcher( elem, context, xml ) ) {
							results.push( elem );
							break;
						}
					}
					if ( outermost ) {
						dirruns = dirrunsUnique;
					}
				}

				// Track unmatched elements for set filters
				if ( bySet ) {
					// They will have gone through all possible matchers
					if ( (elem = !matcher && elem) ) {
						matchedCount--;
					}

					// Lengthen the array for every element, matched or not
					if ( seed ) {
						unmatched.push( elem );
					}
				}
			}

			// Apply set filters to unmatched elements
			matchedCount += i;
			if ( bySet && i !== matchedCount ) {
				j = 0;
				while ( (matcher = setMatchers[j++]) ) {
					matcher( unmatched, setMatched, context, xml );
				}

				if ( seed ) {
					// Reintegrate element matches to eliminate the need for sorting
					if ( matchedCount > 0 ) {
						while ( i-- ) {
							if ( !(unmatched[i] || setMatched[i]) ) {
								setMatched[i] = pop.call( results );
							}
						}
					}

					// Discard index placeholder values to get only actual matches
					setMatched = condense( setMatched );
				}

				// Add matches to results
				push.apply( results, setMatched );

				// Seedless set matches succeeding multiple successful matchers stipulate sorting
				if ( outermost && !seed && setMatched.length > 0 &&
					( matchedCount + setMatchers.length ) > 1 ) {

					Sizzle.uniqueSort( results );
				}
			}

			// Override manipulation of globals by nested matchers
			if ( outermost ) {
				dirruns = dirrunsUnique;
				outermostContext = contextBackup;
			}

			return unmatched;
		};

	return bySet ?
		markFunction( superMatcher ) :
		superMatcher;
}

compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
	var i,
		setMatchers = [],
		elementMatchers = [],
		cached = compilerCache[ selector + " " ];

	if ( !cached ) {
		// Generate a function of recursive functions that can be used to check each element
		if ( !match ) {
			match = tokenize( selector );
		}
		i = match.length;
		while ( i-- ) {
			cached = matcherFromTokens( match[i] );
			if ( cached[ expando ] ) {
				setMatchers.push( cached );
			} else {
				elementMatchers.push( cached );
			}
		}

		// Cache the compiled function
		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );

		// Save selector and tokenization
		cached.selector = selector;
	}
	return cached;
};

/**
 * A low-level selection function that works with Sizzle's compiled
 *  selector functions
 * @param {String|Function} selector A selector or a pre-compiled
 *  selector function built with Sizzle.compile
 * @param {Element} context
 * @param {Array} [results]
 * @param {Array} [seed] A set of elements to match against
 */
select = Sizzle.select = function( selector, context, results, seed ) {
	var i, tokens, token, type, find,
		compiled = typeof selector === "function" && selector,
		match = !seed && tokenize( (selector = compiled.selector || selector) );

	results = results || [];

	// Try to minimize operations if there is no seed and only one group
	if ( match.length === 1 ) {

		// Take a shortcut and set the context if the root selector is an ID
		tokens = match[0] = match[0].slice( 0 );
		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
				support.getById && context.nodeType === 9 && documentIsHTML &&
				Expr.relative[ tokens[1].type ] ) {

			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
			if ( !context ) {
				return results;

			// Precompiled matchers will still verify ancestry, so step up a level
			} else if ( compiled ) {
				context = context.parentNode;
			}

			selector = selector.slice( tokens.shift().value.length );
		}

		// Fetch a seed set for right-to-left matching
		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
		while ( i-- ) {
			token = tokens[i];

			// Abort if we hit a combinator
			if ( Expr.relative[ (type = token.type) ] ) {
				break;
			}
			if ( (find = Expr.find[ type ]) ) {
				// Search, expanding context for leading sibling combinators
				if ( (seed = find(
					token.matches[0].replace( runescape, funescape ),
					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
				)) ) {

					// If seed is empty or no tokens remain, we can return early
					tokens.splice( i, 1 );
					selector = seed.length && toSelector( tokens );
					if ( !selector ) {
						push.apply( results, seed );
						return results;
					}

					break;
				}
			}
		}
	}

	// Compile and execute a filtering function if one is not provided
	// Provide `match` to avoid retokenization if we modified the selector above
	( compiled || compile( selector, match ) )(
		seed,
		context,
		!documentIsHTML,
		results,
		rsibling.test( selector ) && testContext( context.parentNode ) || context
	);
	return results;
};

// One-time assignments

// Sort stability
support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;

// Support: Chrome 14-35+
// Always assume duplicates if they aren't passed to the comparison function
support.detectDuplicates = !!hasDuplicate;

// Initialize against the default document
setDocument();

// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
// Detached nodes confoundingly follow *each other*
support.sortDetached = assert(function( div1 ) {
	// Should return 1, but returns 4 (following)
	return div1.compareDocumentPosition( document.createElement("div") ) & 1;
});

// Support: IE<8
// Prevent attribute/property "interpolation"
// http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
if ( !assert(function( div ) {
	div.innerHTML = "<a href='#'></a>";
	return div.firstChild.getAttribute("href") === "#" ;
}) ) {
	addHandle( "type|href|height|width", function( elem, name, isXML ) {
		if ( !isXML ) {
			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
		}
	});
}

// Support: IE<9
// Use defaultValue in place of getAttribute("value")
if ( !support.attributes || !assert(function( div ) {
	div.innerHTML = "<input/>";
	div.firstChild.setAttribute( "value", "" );
	return div.firstChild.getAttribute( "value" ) === "";
}) ) {
	addHandle( "value", function( elem, name, isXML ) {
		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
			return elem.defaultValue;
		}
	});
}

// Support: IE<9
// Use getAttributeNode to fetch booleans when getAttribute lies
if ( !assert(function( div ) {
	return div.getAttribute("disabled") == null;
}) ) {
	addHandle( booleans, function( elem, name, isXML ) {
		var val;
		if ( !isXML ) {
			return elem[ name ] === true ? name.toLowerCase() :
					(val = elem.getAttributeNode( name )) && val.specified ?
					val.value :
				null;
		}
	});
}

return Sizzle;

})( window );



jQuery.find = Sizzle;
jQuery.expr = Sizzle.selectors;
jQuery.expr[":"] = jQuery.expr.pseudos;
jQuery.unique = Sizzle.uniqueSort;
jQuery.text = Sizzle.getText;
jQuery.isXMLDoc = Sizzle.isXML;
jQuery.contains = Sizzle.contains;



var rneedsContext = jQuery.expr.match.needsContext;

var rsingleTag = (/^<(\w+)\s*\/?>(?:<\/\1>|)$/);



var risSimple = /^.[^:#\[\.,]*$/;

// Implement the identical functionality for filter and not
function winnow( elements, qualifier, not ) {
	if ( jQuery.isFunction( qualifier ) ) {
		return jQuery.grep( elements, function( elem, i ) {
			/* jshint -W018 */
			return !!qualifier.call( elem, i, elem ) !== not;
		});

	}

	if ( qualifier.nodeType ) {
		return jQuery.grep( elements, function( elem ) {
			return ( elem === qualifier ) !== not;
		});

	}

	if ( typeof qualifier === "string" ) {
		if ( risSimple.test( qualifier ) ) {
			return jQuery.filter( qualifier, elements, not );
		}

		qualifier = jQuery.filter( qualifier, elements );
	}

	return jQuery.grep( elements, function( elem ) {
		return ( indexOf.call( qualifier, elem ) >= 0 ) !== not;
	});
}

jQuery.filter = function( expr, elems, not ) {
	var elem = elems[ 0 ];

	if ( not ) {
		expr = ":not(" + expr + ")";
	}

	return elems.length === 1 && elem.nodeType === 1 ?
		jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
		jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
			return elem.nodeType === 1;
		}));
};

jQuery.fn.extend({
	find: function( selector ) {
		var i,
			len = this.length,
			ret = [],
			self = this;

		if ( typeof selector !== "string" ) {
			return this.pushStack( jQuery( selector ).filter(function() {
				for ( i = 0; i < len; i++ ) {
					if ( jQuery.contains( self[ i ], this ) ) {
						return true;
					}
				}
			}) );
		}

		for ( i = 0; i < len; i++ ) {
			jQuery.find( selector, self[ i ], ret );
		}

		// Needed because $( selector, context ) becomes $( context ).find( selector )
		ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
		ret.selector = this.selector ? this.selector + " " + selector : selector;
		return ret;
	},
	filter: function( selector ) {
		return this.pushStack( winnow(this, selector || [], false) );
	},
	not: function( selector ) {
		return this.pushStack( winnow(this, selector || [], true) );
	},
	is: function( selector ) {
		return !!winnow(
			this,

			// If this is a positional/relative selector, check membership in the returned set
			// so $("p:first").is("p:last") won't return true for a doc with two "p".
			typeof selector === "string" && rneedsContext.test( selector ) ?
				jQuery( selector ) :
				selector || [],
			false
		).length;
	}
});


// Initialize a jQuery object


// A central reference to the root jQuery(document)
var rootjQuery,

	// A simple way to check for HTML strings
	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
	// Strict HTML recognition (#11290: must start with <)
	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,

	init = jQuery.fn.init = function( selector, context ) {
		var match, elem;

		// HANDLE: $(""), $(null), $(undefined), $(false)
		if ( !selector ) {
			return this;
		}

		// Handle HTML strings
		if ( typeof selector === "string" ) {
			if ( selector[0] === "<" && selector[ selector.length - 1 ] === ">" && selector.length >= 3 ) {
				// Assume that strings that start and end with <> are HTML and skip the regex check
				match = [ null, selector, null ];

			} else {
				match = rquickExpr.exec( selector );
			}

			// Match html or make sure no context is specified for #id
			if ( match && (match[1] || !context) ) {

				// HANDLE: $(html) -> $(array)
				if ( match[1] ) {
					context = context instanceof jQuery ? context[0] : context;

					// Option to run scripts is true for back-compat
					// Intentionally let the error be thrown if parseHTML is not present
					jQuery.merge( this, jQuery.parseHTML(
						match[1],
						context && context.nodeType ? context.ownerDocument || context : document,
						true
					) );

					// HANDLE: $(html, props)
					if ( rsingleTag.test( match[1] ) && jQuery.isPlainObject( context ) ) {
						for ( match in context ) {
							// Properties of context are called as methods if possible
							if ( jQuery.isFunction( this[ match ] ) ) {
								this[ match ]( context[ match ] );

							// ...and otherwise set as attributes
							} else {
								this.attr( match, context[ match ] );
							}
						}
					}

					return this;

				// HANDLE: $(#id)
				} else {
					elem = document.getElementById( match[2] );

					// Support: Blackberry 4.6
					// gEBID returns nodes no longer in the document (#6963)
					if ( elem && elem.parentNode ) {
						// Inject the element directly into the jQuery object
						this.length = 1;
						this[0] = elem;
					}

					this.context = document;
					this.selector = selector;
					return this;
				}

			// HANDLE: $(expr, $(...))
			} else if ( !context || context.jquery ) {
				return ( context || rootjQuery ).find( selector );

			// HANDLE: $(expr, context)
			// (which is just equivalent to: $(context).find(expr)
			} else {
				return this.constructor( context ).find( selector );
			}

		// HANDLE: $(DOMElement)
		} else if ( selector.nodeType ) {
			this.context = this[0] = selector;
			this.length = 1;
			return this;

		// HANDLE: $(function)
		// Shortcut for document ready
		} else if ( jQuery.isFunction( selector ) ) {
			return typeof rootjQuery.ready !== "undefined" ?
				rootjQuery.ready( selector ) :
				// Execute immediately if ready is not present
				selector( jQuery );
		}

		if ( selector.selector !== undefined ) {
			this.selector = selector.selector;
			this.context = selector.context;
		}

		return jQuery.makeArray( selector, this );
	};

// Give the init function the jQuery prototype for later instantiation
init.prototype = jQuery.fn;

// Initialize central reference
rootjQuery = jQuery( document );


var rparentsprev = /^(?:parents|prev(?:Until|All))/,
	// Methods guaranteed to produce a unique set when starting from a unique set
	guaranteedUnique = {
		children: true,
		contents: true,
		next: true,
		prev: true
	};

jQuery.extend({
	dir: function( elem, dir, until ) {
		var matched = [],
			truncate = until !== undefined;

		while ( (elem = elem[ dir ]) && elem.nodeType !== 9 ) {
			if ( elem.nodeType === 1 ) {
				if ( truncate && jQuery( elem ).is( until ) ) {
					break;
				}
				matched.push( elem );
			}
		}
		return matched;
	},

	sibling: function( n, elem ) {
		var matched = [];

		for ( ; n; n = n.nextSibling ) {
			if ( n.nodeType === 1 && n !== elem ) {
				matched.push( n );
			}
		}

		return matched;
	}
});

jQuery.fn.extend({
	has: function( target ) {
		var targets = jQuery( target, this ),
			l = targets.length;

		return this.filter(function() {
			var i = 0;
			for ( ; i < l; i++ ) {
				if ( jQuery.contains( this, targets[i] ) ) {
					return true;
				}
			}
		});
	},

	closest: function( selectors, context ) {
		var cur,
			i = 0,
			l = this.length,
			matched = [],
			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
				jQuery( selectors, context || this.context ) :
				0;

		for ( ; i < l; i++ ) {
			for ( cur = this[i]; cur && cur !== context; cur = cur.parentNode ) {
				// Always skip document fragments
				if ( cur.nodeType < 11 && (pos ?
					pos.index(cur) > -1 :

					// Don't pass non-elements to Sizzle
					cur.nodeType === 1 &&
						jQuery.find.matchesSelector(cur, selectors)) ) {

					matched.push( cur );
					break;
				}
			}
		}

		return this.pushStack( matched.length > 1 ? jQuery.unique( matched ) : matched );
	},

	// Determine the position of an element within the set
	index: function( elem ) {

		// No argument, return index in parent
		if ( !elem ) {
			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
		}

		// Index in selector
		if ( typeof elem === "string" ) {
			return indexOf.call( jQuery( elem ), this[ 0 ] );
		}

		// Locate the position of the desired element
		return indexOf.call( this,

			// If it receives a jQuery object, the first element is used
			elem.jquery ? elem[ 0 ] : elem
		);
	},

	add: function( selector, context ) {
		return this.pushStack(
			jQuery.unique(
				jQuery.merge( this.get(), jQuery( selector, context ) )
			)
		);
	},

	addBack: function( selector ) {
		return this.add( selector == null ?
			this.prevObject : this.prevObject.filter(selector)
		);
	}
});

function sibling( cur, dir ) {
	while ( (cur = cur[dir]) && cur.nodeType !== 1 ) {}
	return cur;
}

jQuery.each({
	parent: function( elem ) {
		var parent = elem.parentNode;
		return parent && parent.nodeType !== 11 ? parent : null;
	},
	parents: function( elem ) {
		return jQuery.dir( elem, "parentNode" );
	},
	parentsUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "parentNode", until );
	},
	next: function( elem ) {
		return sibling( elem, "nextSibling" );
	},
	prev: function( elem ) {
		return sibling( elem, "previousSibling" );
	},
	nextAll: function( elem ) {
		return jQuery.dir( elem, "nextSibling" );
	},
	prevAll: function( elem ) {
		return jQuery.dir( elem, "previousSibling" );
	},
	nextUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "nextSibling", until );
	},
	prevUntil: function( elem, i, until ) {
		return jQuery.dir( elem, "previousSibling", until );
	},
	siblings: function( elem ) {
		return jQuery.sibling( ( elem.parentNode || {} ).firstChild, elem );
	},
	children: function( elem ) {
		return jQuery.sibling( elem.firstChild );
	},
	contents: function( elem ) {
		return elem.contentDocument || jQuery.merge( [], elem.childNodes );
	}
}, function( name, fn ) {
	jQuery.fn[ name ] = function( until, selector ) {
		var matched = jQuery.map( this, fn, until );

		if ( name.slice( -5 ) !== "Until" ) {
			selector = until;
		}

		if ( selector && typeof selector === "string" ) {
			matched = jQuery.filter( selector, matched );
		}

		if ( this.length > 1 ) {
			// Remove duplicates
			if ( !guaranteedUnique[ name ] ) {
				jQuery.unique( matched );
			}

			// Reverse order for parents* and prev-derivatives
			if ( rparentsprev.test( name ) ) {
				matched.reverse();
			}
		}

		return this.pushStack( matched );
	};
});
var rnotwhite = (/\S+/g);



// String to Object options format cache
var optionsCache = {};

// Convert String-formatted options into Object-formatted ones and store in cache
function createOptions( options ) {
	var object = optionsCache[ options ] = {};
	jQuery.each( options.match( rnotwhite ) || [], function( _, flag ) {
		object[ flag ] = true;
	});
	return object;
}

/*
 * Create a callback list using the following parameters:
 *
 *	options: an optional list of space-separated options that will change how
 *			the callback list behaves or a more traditional option object
 *
 * By default a callback list will act like an event callback list and can be
 * "fired" multiple times.
 *
 * Possible options:
 *
 *	once:			will ensure the callback list can only be fired once (like a Deferred)
 *
 *	memory:			will keep track of previous values and will call any callback added
 *					after the list has been fired right away with the latest "memorized"
 *					values (like a Deferred)
 *
 *	unique:			will ensure a callback can only be added once (no duplicate in the list)
 *
 *	stopOnFalse:	interrupt callings when a callback returns false
 *
 */
jQuery.Callbacks = function( options ) {

	// Convert options from String-formatted to Object-formatted if needed
	// (we check in cache first)
	options = typeof options === "string" ?
		( optionsCache[ options ] || createOptions( options ) ) :
		jQuery.extend( {}, options );

	var // Last fire value (for non-forgettable lists)
		memory,
		// Flag to know if list was already fired
		fired,
		// Flag to know if list is currently firing
		firing,
		// First callback to fire (used internally by add and fireWith)
		firingStart,
		// End of the loop when firing
		firingLength,
		// Index of currently firing callback (modified by remove if needed)
		firingIndex,
		// Actual callback list
		list = [],
		// Stack of fire calls for repeatable lists
		stack = !options.once && [],
		// Fire callbacks
		fire = function( data ) {
			memory = options.memory && data;
			fired = true;
			firingIndex = firingStart || 0;
			firingStart = 0;
			firingLength = list.length;
			firing = true;
			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
					memory = false; // To prevent further calls using add
					break;
				}
			}
			firing = false;
			if ( list ) {
				if ( stack ) {
					if ( stack.length ) {
						fire( stack.shift() );
					}
				} else if ( memory ) {
					list = [];
				} else {
					self.disable();
				}
			}
		},
		// Actual Callbacks object
		self = {
			// Add a callback or a collection of callbacks to the list
			add: function() {
				if ( list ) {
					// First, we save the current length
					var start = list.length;
					(function add( args ) {
						jQuery.each( args, function( _, arg ) {
							var type = jQuery.type( arg );
							if ( type === "function" ) {
								if ( !options.unique || !self.has( arg ) ) {
									list.push( arg );
								}
							} else if ( arg && arg.length && type !== "string" ) {
								// Inspect recursively
								add( arg );
							}
						});
					})( arguments );
					// Do we need to add the callbacks to the
					// current firing batch?
					if ( firing ) {
						firingLength = list.length;
					// With memory, if we're not firing then
					// we should call right away
					} else if ( memory ) {
						firingStart = start;
						fire( memory );
					}
				}
				return this;
			},
			// Remove a callback from the list
			remove: function() {
				if ( list ) {
					jQuery.each( arguments, function( _, arg ) {
						var index;
						while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
							list.splice( index, 1 );
							// Handle firing indexes
							if ( firing ) {
								if ( index <= firingLength ) {
									firingLength--;
								}
								if ( index <= firingIndex ) {
									firingIndex--;
								}
							}
						}
					});
				}
				return this;
			},
			// Check if a given callback is in the list.
			// If no argument is given, return whether or not list has callbacks attached.
			has: function( fn ) {
				return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
			},
			// Remove all callbacks from the list
			empty: function() {
				list = [];
				firingLength = 0;
				return this;
			},
			// Have the list do nothing anymore
			disable: function() {
				list = stack = memory = undefined;
				return this;
			},
			// Is it disabled?
			disabled: function() {
				return !list;
			},
			// Lock the list in its current state
			lock: function() {
				stack = undefined;
				if ( !memory ) {
					self.disable();
				}
				return this;
			},
			// Is it locked?
			locked: function() {
				return !stack;
			},
			// Call all callbacks with the given context and arguments
			fireWith: function( context, args ) {
				if ( list && ( !fired || stack ) ) {
					args = args || [];
					args = [ context, args.slice ? args.slice() : args ];
					if ( firing ) {
						stack.push( args );
					} else {
						fire( args );
					}
				}
				return this;
			},
			// Call all the callbacks with the given arguments
			fire: function() {
				self.fireWith( this, arguments );
				return this;
			},
			// To know if the callbacks have already been called at least once
			fired: function() {
				return !!fired;
			}
		};

	return self;
};


jQuery.extend({

	Deferred: function( func ) {
		var tuples = [
				// action, add listener, listener list, final state
				[ "resolve", "done", jQuery.Callbacks("once memory"), "resolved" ],
				[ "reject", "fail", jQuery.Callbacks("once memory"), "rejected" ],
				[ "notify", "progress", jQuery.Callbacks("memory") ]
			],
			state = "pending",
			promise = {
				state: function() {
					return state;
				},
				always: function() {
					deferred.done( arguments ).fail( arguments );
					return this;
				},
				then: function( /* fnDone, fnFail, fnProgress */ ) {
					var fns = arguments;
					return jQuery.Deferred(function( newDefer ) {
						jQuery.each( tuples, function( i, tuple ) {
							var fn = jQuery.isFunction( fns[ i ] ) && fns[ i ];
							// deferred[ done | fail | progress ] for forwarding actions to newDefer
							deferred[ tuple[1] ](function() {
								var returned = fn && fn.apply( this, arguments );
								if ( returned && jQuery.isFunction( returned.promise ) ) {
									returned.promise()
										.done( newDefer.resolve )
										.fail( newDefer.reject )
										.progress( newDefer.notify );
								} else {
									newDefer[ tuple[ 0 ] + "With" ]( this === promise ? newDefer.promise() : this, fn ? [ returned ] : arguments );
								}
							});
						});
						fns = null;
					}).promise();
				},
				// Get a promise for this deferred
				// If obj is provided, the promise aspect is added to the object
				promise: function( obj ) {
					return obj != null ? jQuery.extend( obj, promise ) : promise;
				}
			},
			deferred = {};

		// Keep pipe for back-compat
		promise.pipe = promise.then;

		// Add list-specific methods
		jQuery.each( tuples, function( i, tuple ) {
			var list = tuple[ 2 ],
				stateString = tuple[ 3 ];

			// promise[ done | fail | progress ] = list.add
			promise[ tuple[1] ] = list.add;

			// Handle state
			if ( stateString ) {
				list.add(function() {
					// state = [ resolved | rejected ]
					state = stateString;

				// [ reject_list | resolve_list ].disable; progress_list.lock
				}, tuples[ i ^ 1 ][ 2 ].disable, tuples[ 2 ][ 2 ].lock );
			}

			// deferred[ resolve | reject | notify ]
			deferred[ tuple[0] ] = function() {
				deferred[ tuple[0] + "With" ]( this === deferred ? promise : this, arguments );
				return this;
			};
			deferred[ tuple[0] + "With" ] = list.fireWith;
		});

		// Make the deferred a promise
		promise.promise( deferred );

		// Call given func if any
		if ( func ) {
			func.call( deferred, deferred );
		}

		// All done!
		return deferred;
	},

	// Deferred helper
	when: function( subordinate /* , ..., subordinateN */ ) {
		var i = 0,
			resolveValues = slice.call( arguments ),
			length = resolveValues.length,

			// the count of uncompleted subordinates
			remaining = length !== 1 || ( subordinate && jQuery.isFunction( subordinate.promise ) ) ? length : 0,

			// the master Deferred. If resolveValues consist of only a single Deferred, just use that.
			deferred = remaining === 1 ? subordinate : jQuery.Deferred(),

			// Update function for both resolve and progress values
			updateFunc = function( i, contexts, values ) {
				return function( value ) {
					contexts[ i ] = this;
					values[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
					if ( values === progressValues ) {
						deferred.notifyWith( contexts, values );
					} else if ( !( --remaining ) ) {
						deferred.resolveWith( contexts, values );
					}
				};
			},

			progressValues, progressContexts, resolveContexts;

		// Add listeners to Deferred subordinates; treat others as resolved
		if ( length > 1 ) {
			progressValues = new Array( length );
			progressContexts = new Array( length );
			resolveContexts = new Array( length );
			for ( ; i < length; i++ ) {
				if ( resolveValues[ i ] && jQuery.isFunction( resolveValues[ i ].promise ) ) {
					resolveValues[ i ].promise()
						.done( updateFunc( i, resolveContexts, resolveValues ) )
						.fail( deferred.reject )
						.progress( updateFunc( i, progressContexts, progressValues ) );
				} else {
					--remaining;
				}
			}
		}

		// If we're not waiting on anything, resolve the master
		if ( !remaining ) {
			deferred.resolveWith( resolveContexts, resolveValues );
		}

		return deferred.promise();
	}
});


// The deferred used on DOM ready
var readyList;

jQuery.fn.ready = function( fn ) {
	// Add the callback
	jQuery.ready.promise().done( fn );

	return this;
};

jQuery.extend({
	// Is the DOM ready to be used? Set to true once it occurs.
	isReady: false,

	// A counter to track how many items to wait for before
	// the ready event fires. See #6781
	readyWait: 1,

	// Hold (or release) the ready event
	holdReady: function( hold ) {
		if ( hold ) {
			jQuery.readyWait++;
		} else {
			jQuery.ready( true );
		}
	},

	// Handle when the DOM is ready
	ready: function( wait ) {

		// Abort if there are pending holds or we're already ready
		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
			return;
		}

		// Remember that the DOM is ready
		jQuery.isReady = true;

		// If a normal DOM Ready event fired, decrement, and wait if need be
		if ( wait !== true && --jQuery.readyWait > 0 ) {
			return;
		}

		// If there are functions bound, to execute
		readyList.resolveWith( document, [ jQuery ] );

		// Trigger any bound ready events
		if ( jQuery.fn.triggerHandler ) {
			jQuery( document ).triggerHandler( "ready" );
			jQuery( document ).off( "ready" );
		}
	}
});

/**
 * The ready event handler and self cleanup method
 */
function completed() {
	document.removeEventListener( "DOMContentLoaded", completed, false );
	window.removeEventListener( "load", completed, false );
	jQuery.ready();
}

jQuery.ready.promise = function( obj ) {
	if ( !readyList ) {

		readyList = jQuery.Deferred();

		// Catch cases where $(document).ready() is called after the browser event has already occurred.
		// We once tried to use readyState "interactive" here, but it caused issues like the one
		// discovered by ChrisS here: http://bugs.jquery.com/ticket/12282#comment:15
		if ( document.readyState === "complete" ) {
			// Handle it asynchronously to allow scripts the opportunity to delay ready
			setTimeout( jQuery.ready );

		} else {

			// Use the handy event callback
			document.addEventListener( "DOMContentLoaded", completed, false );

			// A fallback to window.onload, that will always work
			window.addEventListener( "load", completed, false );
		}
	}
	return readyList.promise( obj );
};

// Kick off the DOM ready check even if the user does not
jQuery.ready.promise();




// Multifunctional method to get and set values of a collection
// The value/s can optionally be executed if it's a function
var access = jQuery.access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
	var i = 0,
		len = elems.length,
		bulk = key == null;

	// Sets many values
	if ( jQuery.type( key ) === "object" ) {
		chainable = true;
		for ( i in key ) {
			jQuery.access( elems, fn, i, key[i], true, emptyGet, raw );
		}

	// Sets one value
	} else if ( value !== undefined ) {
		chainable = true;

		if ( !jQuery.isFunction( value ) ) {
			raw = true;
		}

		if ( bulk ) {
			// Bulk operations run against the entire set
			if ( raw ) {
				fn.call( elems, value );
				fn = null;

			// ...except when executing function values
			} else {
				bulk = fn;
				fn = function( elem, key, value ) {
					return bulk.call( jQuery( elem ), value );
				};
			}
		}

		if ( fn ) {
			for ( ; i < len; i++ ) {
				fn( elems[i], key, raw ? value : value.call( elems[i], i, fn( elems[i], key ) ) );
			}
		}
	}

	return chainable ?
		elems :

		// Gets
		bulk ?
			fn.call( elems ) :
			len ? fn( elems[0], key ) : emptyGet;
};


/**
 * Determines whether an object can have data
 */
jQuery.acceptData = function( owner ) {
	// Accepts only:
	//  - Node
	//    - Node.ELEMENT_NODE
	//    - Node.DOCUMENT_NODE
	//  - Object
	//    - Any
	/* jshint -W018 */
	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
};


function Data() {
	// Support: Android<4,
	// Old WebKit does not have Object.preventExtensions/freeze method,
	// return new empty object instead with no [[set]] accessor
	Object.defineProperty( this.cache = {}, 0, {
		get: function() {
			return {};
		}
	});

	this.expando = jQuery.expando + Data.uid++;
}

Data.uid = 1;
Data.accepts = jQuery.acceptData;

Data.prototype = {
	key: function( owner ) {
		// We can accept data for non-element nodes in modern browsers,
		// but we should not, see #8335.
		// Always return the key for a frozen object.
		if ( !Data.accepts( owner ) ) {
			return 0;
		}

		var descriptor = {},
			// Check if the owner object already has a cache key
			unlock = owner[ this.expando ];

		// If not, create one
		if ( !unlock ) {
			unlock = Data.uid++;

			// Secure it in a non-enumerable, non-writable property
			try {
				descriptor[ this.expando ] = { value: unlock };
				Object.defineProperties( owner, descriptor );

			// Support: Android<4
			// Fallback to a less secure definition
			} catch ( e ) {
				descriptor[ this.expando ] = unlock;
				jQuery.extend( owner, descriptor );
			}
		}

		// Ensure the cache object
		if ( !this.cache[ unlock ] ) {
			this.cache[ unlock ] = {};
		}

		return unlock;
	},
	set: function( owner, data, value ) {
		var prop,
			// There may be an unlock assigned to this node,
			// if there is no entry for this "owner", create one inline
			// and set the unlock as though an owner entry had always existed
			unlock = this.key( owner ),
			cache = this.cache[ unlock ];

		// Handle: [ owner, key, value ] args
		if ( typeof data === "string" ) {
			cache[ data ] = value;

		// Handle: [ owner, { properties } ] args
		} else {
			// Fresh assignments by object are shallow copied
			if ( jQuery.isEmptyObject( cache ) ) {
				jQuery.extend( this.cache[ unlock ], data );
			// Otherwise, copy the properties one-by-one to the cache object
			} else {
				for ( prop in data ) {
					cache[ prop ] = data[ prop ];
				}
			}
		}
		return cache;
	},
	get: function( owner, key ) {
		// Either a valid cache is found, or will be created.
		// New caches will be created and the unlock returned,
		// allowing direct access to the newly created
		// empty data object. A valid owner object must be provided.
		var cache = this.cache[ this.key( owner ) ];

		return key === undefined ?
			cache : cache[ key ];
	},
	access: function( owner, key, value ) {
		var stored;
		// In cases where either:
		//
		//   1. No key was specified
		//   2. A string key was specified, but no value provided
		//
		// Take the "read" path and allow the get method to determine
		// which value to return, respectively either:
		//
		//   1. The entire cache object
		//   2. The data stored at the key
		//
		if ( key === undefined ||
				((key && typeof key === "string") && value === undefined) ) {

			stored = this.get( owner, key );

			return stored !== undefined ?
				stored : this.get( owner, jQuery.camelCase(key) );
		}

		// [*]When the key is not a string, or both a key and value
		// are specified, set or extend (existing objects) with either:
		//
		//   1. An object of properties
		//   2. A key and value
		//
		this.set( owner, key, value );

		// Since the "set" path can have two possible entry points
		// return the expected data based on which path was taken[*]
		return value !== undefined ? value : key;
	},
	remove: function( owner, key ) {
		var i, name, camel,
			unlock = this.key( owner ),
			cache = this.cache[ unlock ];

		if ( key === undefined ) {
			this.cache[ unlock ] = {};

		} else {
			// Support array or space separated string of keys
			if ( jQuery.isArray( key ) ) {
				// If "name" is an array of keys...
				// When data is initially created, via ("key", "val") signature,
				// keys will be converted to camelCase.
				// Since there is no way to tell _how_ a key was added, remove
				// both plain key and camelCase key. #12786
				// This will only penalize the array argument path.
				name = key.concat( key.map( jQuery.camelCase ) );
			} else {
				camel = jQuery.camelCase( key );
				// Try the string as a key before any manipulation
				if ( key in cache ) {
					name = [ key, camel ];
				} else {
					// If a key with the spaces exists, use it.
					// Otherwise, create an array by matching non-whitespace
					name = camel;
					name = name in cache ?
						[ name ] : ( name.match( rnotwhite ) || [] );
				}
			}

			i = name.length;
			while ( i-- ) {
				delete cache[ name[ i ] ];
			}
		}
	},
	hasData: function( owner ) {
		return !jQuery.isEmptyObject(
			this.cache[ owner[ this.expando ] ] || {}
		);
	},
	discard: function( owner ) {
		if ( owner[ this.expando ] ) {
			delete this.cache[ owner[ this.expando ] ];
		}
	}
};
var data_priv = new Data();

var data_user = new Data();



//	Implementation Summary
//
//	1. Enforce API surface and semantic compatibility with 1.9.x branch
//	2. Improve the module's maintainability by reducing the storage
//		paths to a single mechanism.
//	3. Use the same single mechanism to support "private" and "user" data.
//	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
//	5. Avoid exposing implementation details on user objects (eg. expando properties)
//	6. Provide a clear path for implementation upgrade to WeakMap in 2014

var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
	rmultiDash = /([A-Z])/g;

function dataAttr( elem, key, data ) {
	var name;

	// If nothing was found internally, try to fetch any
	// data from the HTML5 data-* attribute
	if ( data === undefined && elem.nodeType === 1 ) {
		name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
		data = elem.getAttribute( name );

		if ( typeof data === "string" ) {
			try {
				data = data === "true" ? true :
					data === "false" ? false :
					data === "null" ? null :
					// Only convert to a number if it doesn't change the string
					+data + "" === data ? +data :
					rbrace.test( data ) ? jQuery.parseJSON( data ) :
					data;
			} catch( e ) {}

			// Make sure we set the data so it isn't changed later
			data_user.set( elem, key, data );
		} else {
			data = undefined;
		}
	}
	return data;
}

jQuery.extend({
	hasData: function( elem ) {
		return data_user.hasData( elem ) || data_priv.hasData( elem );
	},

	data: function( elem, name, data ) {
		return data_user.access( elem, name, data );
	},

	removeData: function( elem, name ) {
		data_user.remove( elem, name );
	},

	// TODO: Now that all calls to _data and _removeData have been replaced
	// with direct calls to data_priv methods, these can be deprecated.
	_data: function( elem, name, data ) {
		return data_priv.access( elem, name, data );
	},

	_removeData: function( elem, name ) {
		data_priv.remove( elem, name );
	}
});

jQuery.fn.extend({
	data: function( key, value ) {
		var i, name, data,
			elem = this[ 0 ],
			attrs = elem && elem.attributes;

		// Gets all values
		if ( key === undefined ) {
			if ( this.length ) {
				data = data_user.get( elem );

				if ( elem.nodeType === 1 && !data_priv.get( elem, "hasDataAttrs" ) ) {
					i = attrs.length;
					while ( i-- ) {

						// Support: IE11+
						// The attrs elements can be null (#14894)
						if ( attrs[ i ] ) {
							name = attrs[ i ].name;
							if ( name.indexOf( "data-" ) === 0 ) {
								name = jQuery.camelCase( name.slice(5) );
								dataAttr( elem, name, data[ name ] );
							}
						}
					}
					data_priv.set( elem, "hasDataAttrs", true );
				}
			}

			return data;
		}

		// Sets multiple values
		if ( typeof key === "object" ) {
			return this.each(function() {
				data_user.set( this, key );
			});
		}

		return access( this, function( value ) {
			var data,
				camelKey = jQuery.camelCase( key );

			// The calling jQuery object (element matches) is not empty
			// (and therefore has an element appears at this[ 0 ]) and the
			// `value` parameter was not undefined. An empty jQuery object
			// will result in `undefined` for elem = this[ 0 ] which will
			// throw an exception if an attempt to read a data cache is made.
			if ( elem && value === undefined ) {
				// Attempt to get data from the cache
				// with the key as-is
				data = data_user.get( elem, key );
				if ( data !== undefined ) {
					return data;
				}

				// Attempt to get data from the cache
				// with the key camelized
				data = data_user.get( elem, camelKey );
				if ( data !== undefined ) {
					return data;
				}

				// Attempt to "discover" the data in
				// HTML5 custom data-* attrs
				data = dataAttr( elem, camelKey, undefined );
				if ( data !== undefined ) {
					return data;
				}

				// We tried really hard, but the data doesn't exist.
				return;
			}

			// Set the data...
			this.each(function() {
				// First, attempt to store a copy or reference of any
				// data that might've been store with a camelCased key.
				var data = data_user.get( this, camelKey );

				// For HTML5 data-* attribute interop, we have to
				// store property names with dashes in a camelCase form.
				// This might not apply to all properties...*
				data_user.set( this, camelKey, value );

				// *... In the case of properties that might _actually_
				// have dashes, we need to also store a copy of that
				// unchanged property.
				if ( key.indexOf("-") !== -1 && data !== undefined ) {
					data_user.set( this, key, value );
				}
			});
		}, null, value, arguments.length > 1, null, true );
	},

	removeData: function( key ) {
		return this.each(function() {
			data_user.remove( this, key );
		});
	}
});


jQuery.extend({
	queue: function( elem, type, data ) {
		var queue;

		if ( elem ) {
			type = ( type || "fx" ) + "queue";
			queue = data_priv.get( elem, type );

			// Speed up dequeue by getting out quickly if this is just a lookup
			if ( data ) {
				if ( !queue || jQuery.isArray( data ) ) {
					queue = data_priv.access( elem, type, jQuery.makeArray(data) );
				} else {
					queue.push( data );
				}
			}
			return queue || [];
		}
	},

	dequeue: function( elem, type ) {
		type = type || "fx";

		var queue = jQuery.queue( elem, type ),
			startLength = queue.length,
			fn = queue.shift(),
			hooks = jQuery._queueHooks( elem, type ),
			next = function() {
				jQuery.dequeue( elem, type );
			};

		// If the fx queue is dequeued, always remove the progress sentinel
		if ( fn === "inprogress" ) {
			fn = queue.shift();
			startLength--;
		}

		if ( fn ) {

			// Add a progress sentinel to prevent the fx queue from being
			// automatically dequeued
			if ( type === "fx" ) {
				queue.unshift( "inprogress" );
			}

			// Clear up the last queue stop function
			delete hooks.stop;
			fn.call( elem, next, hooks );
		}

		if ( !startLength && hooks ) {
			hooks.empty.fire();
		}
	},

	// Not public - generate a queueHooks object, or return the current one
	_queueHooks: function( elem, type ) {
		var key = type + "queueHooks";
		return data_priv.get( elem, key ) || data_priv.access( elem, key, {
			empty: jQuery.Callbacks("once memory").add(function() {
				data_priv.remove( elem, [ type + "queue", key ] );
			})
		});
	}
});

jQuery.fn.extend({
	queue: function( type, data ) {
		var setter = 2;

		if ( typeof type !== "string" ) {
			data = type;
			type = "fx";
			setter--;
		}

		if ( arguments.length < setter ) {
			return jQuery.queue( this[0], type );
		}

		return data === undefined ?
			this :
			this.each(function() {
				var queue = jQuery.queue( this, type, data );

				// Ensure a hooks for this queue
				jQuery._queueHooks( this, type );

				if ( type === "fx" && queue[0] !== "inprogress" ) {
					jQuery.dequeue( this, type );
				}
			});
	},
	dequeue: function( type ) {
		return this.each(function() {
			jQuery.dequeue( this, type );
		});
	},
	clearQueue: function( type ) {
		return this.queue( type || "fx", [] );
	},
	// Get a promise resolved when queues of a certain type
	// are emptied (fx is the type by default)
	promise: function( type, obj ) {
		var tmp,
			count = 1,
			defer = jQuery.Deferred(),
			elements = this,
			i = this.length,
			resolve = function() {
				if ( !( --count ) ) {
					defer.resolveWith( elements, [ elements ] );
				}
			};

		if ( typeof type !== "string" ) {
			obj = type;
			type = undefined;
		}
		type = type || "fx";

		while ( i-- ) {
			tmp = data_priv.get( elements[ i ], type + "queueHooks" );
			if ( tmp && tmp.empty ) {
				count++;
				tmp.empty.add( resolve );
			}
		}
		resolve();
		return defer.promise( obj );
	}
});
var pnum = (/[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/).source;

var cssExpand = [ "Top", "Right", "Bottom", "Left" ];

var isHidden = function( elem, el ) {
		// isHidden might be called from jQuery#filter function;
		// in that case, element will be second argument
		elem = el || elem;
		return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
	};

var rcheckableType = (/^(?:checkbox|radio)$/i);



(function() {
	var fragment = document.createDocumentFragment(),
		div = fragment.appendChild( document.createElement( "div" ) ),
		input = document.createElement( "input" );

	// Support: Safari<=5.1
	// Check state lost if the name is set (#11217)
	// Support: Windows Web Apps (WWA)
	// `name` and `type` must use .setAttribute for WWA (#14901)
	input.setAttribute( "type", "radio" );
	input.setAttribute( "checked", "checked" );
	input.setAttribute( "name", "t" );

	div.appendChild( input );

	// Support: Safari<=5.1, Android<4.2
	// Older WebKit doesn't clone checked state correctly in fragments
	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;

	// Support: IE<=11+
	// Make sure textarea (and checkbox) defaultValue is properly cloned
	div.innerHTML = "<textarea>x</textarea>";
	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
})();
var strundefined = typeof undefined;



support.focusinBubbles = "onfocusin" in window;


var
	rkeyEvent = /^key/,
	rmouseEvent = /^(?:mouse|pointer|contextmenu)|click/,
	rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
	rtypenamespace = /^([^.]*)(?:\.(.+)|)$/;

function returnTrue() {
	return true;
}

function returnFalse() {
	return false;
}

function safeActiveElement() {
	try {
		return document.activeElement;
	} catch ( err ) { }
}

/*
 * Helper functions for managing events -- not part of the public interface.
 * Props to Dean Edwards' addEvent library for many of the ideas.
 */
jQuery.event = {

	global: {},

	add: function( elem, types, handler, data, selector ) {

		var handleObjIn, eventHandle, tmp,
			events, t, handleObj,
			special, handlers, type, namespaces, origType,
			elemData = data_priv.get( elem );

		// Don't attach events to noData or text/comment nodes (but allow plain objects)
		if ( !elemData ) {
			return;
		}

		// Caller can pass in an object of custom data in lieu of the handler
		if ( handler.handler ) {
			handleObjIn = handler;
			handler = handleObjIn.handler;
			selector = handleObjIn.selector;
		}

		// Make sure that the handler has a unique ID, used to find/remove it later
		if ( !handler.guid ) {
			handler.guid = jQuery.guid++;
		}

		// Init the element's event structure and main handler, if this is the first
		if ( !(events = elemData.events) ) {
			events = elemData.events = {};
		}
		if ( !(eventHandle = elemData.handle) ) {
			eventHandle = elemData.handle = function( e ) {
				// Discard the second event of a jQuery.event.trigger() and
				// when an event is called after a page has unloaded
				return typeof jQuery !== strundefined && jQuery.event.triggered !== e.type ?
					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
			};
		}

		// Handle multiple events separated by a space
		types = ( types || "" ).match( rnotwhite ) || [ "" ];
		t = types.length;
		while ( t-- ) {
			tmp = rtypenamespace.exec( types[t] ) || [];
			type = origType = tmp[1];
			namespaces = ( tmp[2] || "" ).split( "." ).sort();

			// There *must* be a type, no attaching namespace-only handlers
			if ( !type ) {
				continue;
			}

			// If event changes its type, use the special event handlers for the changed type
			special = jQuery.event.special[ type ] || {};

			// If selector defined, determine special event api type, otherwise given type
			type = ( selector ? special.delegateType : special.bindType ) || type;

			// Update special based on newly reset type
			special = jQuery.event.special[ type ] || {};

			// handleObj is passed to all event handlers
			handleObj = jQuery.extend({
				type: type,
				origType: origType,
				data: data,
				handler: handler,
				guid: handler.guid,
				selector: selector,
				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
				namespace: namespaces.join(".")
			}, handleObjIn );

			// Init the event handler queue if we're the first
			if ( !(handlers = events[ type ]) ) {
				handlers = events[ type ] = [];
				handlers.delegateCount = 0;

				// Only use addEventListener if the special events handler returns false
				if ( !special.setup || special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
					if ( elem.addEventListener ) {
						elem.addEventListener( type, eventHandle, false );
					}
				}
			}

			if ( special.add ) {
				special.add.call( elem, handleObj );

				if ( !handleObj.handler.guid ) {
					handleObj.handler.guid = handler.guid;
				}
			}

			// Add to the element's handler list, delegates in front
			if ( selector ) {
				handlers.splice( handlers.delegateCount++, 0, handleObj );
			} else {
				handlers.push( handleObj );
			}

			// Keep track of which events have ever been used, for event optimization
			jQuery.event.global[ type ] = true;
		}

	},

	// Detach an event or set of events from an element
	remove: function( elem, types, handler, selector, mappedTypes ) {

		var j, origCount, tmp,
			events, t, handleObj,
			special, handlers, type, namespaces, origType,
			elemData = data_priv.hasData( elem ) && data_priv.get( elem );

		if ( !elemData || !(events = elemData.events) ) {
			return;
		}

		// Once for each type.namespace in types; type may be omitted
		types = ( types || "" ).match( rnotwhite ) || [ "" ];
		t = types.length;
		while ( t-- ) {
			tmp = rtypenamespace.exec( types[t] ) || [];
			type = origType = tmp[1];
			namespaces = ( tmp[2] || "" ).split( "." ).sort();

			// Unbind all events (on this namespace, if provided) for the element
			if ( !type ) {
				for ( type in events ) {
					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
				}
				continue;
			}

			special = jQuery.event.special[ type ] || {};
			type = ( selector ? special.delegateType : special.bindType ) || type;
			handlers = events[ type ] || [];
			tmp = tmp[2] && new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" );

			// Remove matching events
			origCount = j = handlers.length;
			while ( j-- ) {
				handleObj = handlers[ j ];

				if ( ( mappedTypes || origType === handleObj.origType ) &&
					( !handler || handler.guid === handleObj.guid ) &&
					( !tmp || tmp.test( handleObj.namespace ) ) &&
					( !selector || selector === handleObj.selector || selector === "**" && handleObj.selector ) ) {
					handlers.splice( j, 1 );

					if ( handleObj.selector ) {
						handlers.delegateCount--;
					}
					if ( special.remove ) {
						special.remove.call( elem, handleObj );
					}
				}
			}

			// Remove generic event handler if we removed something and no more handlers exist
			// (avoids potential for endless recursion during removal of special event handlers)
			if ( origCount && !handlers.length ) {
				if ( !special.teardown || special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
					jQuery.removeEvent( elem, type, elemData.handle );
				}

				delete events[ type ];
			}
		}

		// Remove the expando if it's no longer used
		if ( jQuery.isEmptyObject( events ) ) {
			delete elemData.handle;
			data_priv.remove( elem, "events" );
		}
	},

	trigger: function( event, data, elem, onlyHandlers ) {

		var i, cur, tmp, bubbleType, ontype, handle, special,
			eventPath = [ elem || document ],
			type = hasOwn.call( event, "type" ) ? event.type : event,
			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split(".") : [];

		cur = tmp = elem = elem || document;

		// Don't do events on text and comment nodes
		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
			return;
		}

		// focus/blur morphs to focusin/out; ensure we're not firing them right now
		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
			return;
		}

		if ( type.indexOf(".") >= 0 ) {
			// Namespaced trigger; create a regexp to match event type in handle()
			namespaces = type.split(".");
			type = namespaces.shift();
			namespaces.sort();
		}
		ontype = type.indexOf(":") < 0 && "on" + type;

		// Caller can pass in a jQuery.Event object, Object, or just an event type string
		event = event[ jQuery.expando ] ?
			event :
			new jQuery.Event( type, typeof event === "object" && event );

		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
		event.isTrigger = onlyHandlers ? 2 : 3;
		event.namespace = namespaces.join(".");
		event.namespace_re = event.namespace ?
			new RegExp( "(^|\\.)" + namespaces.join("\\.(?:.*\\.|)") + "(\\.|$)" ) :
			null;

		// Clean up the event in case it is being reused
		event.result = undefined;
		if ( !event.target ) {
			event.target = elem;
		}

		// Clone any incoming data and prepend the event, creating the handler arg list
		data = data == null ?
			[ event ] :
			jQuery.makeArray( data, [ event ] );

		// Allow special events to draw outside the lines
		special = jQuery.event.special[ type ] || {};
		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
			return;
		}

		// Determine event propagation path in advance, per W3C events spec (#9951)
		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {

			bubbleType = special.delegateType || type;
			if ( !rfocusMorph.test( bubbleType + type ) ) {
				cur = cur.parentNode;
			}
			for ( ; cur; cur = cur.parentNode ) {
				eventPath.push( cur );
				tmp = cur;
			}

			// Only add window if we got to document (e.g., not plain obj or detached DOM)
			if ( tmp === (elem.ownerDocument || document) ) {
				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
			}
		}

		// Fire handlers on the event path
		i = 0;
		while ( (cur = eventPath[i++]) && !event.isPropagationStopped() ) {

			event.type = i > 1 ?
				bubbleType :
				special.bindType || type;

			// jQuery handler
			handle = ( data_priv.get( cur, "events" ) || {} )[ event.type ] && data_priv.get( cur, "handle" );
			if ( handle ) {
				handle.apply( cur, data );
			}

			// Native handler
			handle = ontype && cur[ ontype ];
			if ( handle && handle.apply && jQuery.acceptData( cur ) ) {
				event.result = handle.apply( cur, data );
				if ( event.result === false ) {
					event.preventDefault();
				}
			}
		}
		event.type = type;

		// If nobody prevented the default action, do it now
		if ( !onlyHandlers && !event.isDefaultPrevented() ) {

			if ( (!special._default || special._default.apply( eventPath.pop(), data ) === false) &&
				jQuery.acceptData( elem ) ) {

				// Call a native DOM method on the target with the same name name as the event.
				// Don't do default actions on window, that's where global variables be (#6170)
				if ( ontype && jQuery.isFunction( elem[ type ] ) && !jQuery.isWindow( elem ) ) {

					// Don't re-trigger an onFOO event when we call its FOO() method
					tmp = elem[ ontype ];

					if ( tmp ) {
						elem[ ontype ] = null;
					}

					// Prevent re-triggering of the same event, since we already bubbled it above
					jQuery.event.triggered = type;
					elem[ type ]();
					jQuery.event.triggered = undefined;

					if ( tmp ) {
						elem[ ontype ] = tmp;
					}
				}
			}
		}

		return event.result;
	},

	dispatch: function( event ) {

		// Make a writable jQuery.Event from the native event object
		event = jQuery.event.fix( event );

		var i, j, ret, matched, handleObj,
			handlerQueue = [],
			args = slice.call( arguments ),
			handlers = ( data_priv.get( this, "events" ) || {} )[ event.type ] || [],
			special = jQuery.event.special[ event.type ] || {};

		// Use the fix-ed jQuery.Event rather than the (read-only) native event
		args[0] = event;
		event.delegateTarget = this;

		// Call the preDispatch hook for the mapped type, and let it bail if desired
		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
			return;
		}

		// Determine handlers
		handlerQueue = jQuery.event.handlers.call( this, event, handlers );

		// Run delegates first; they may want to stop propagation beneath us
		i = 0;
		while ( (matched = handlerQueue[ i++ ]) && !event.isPropagationStopped() ) {
			event.currentTarget = matched.elem;

			j = 0;
			while ( (handleObj = matched.handlers[ j++ ]) && !event.isImmediatePropagationStopped() ) {

				// Triggered event must either 1) have no namespace, or 2) have namespace(s)
				// a subset or equal to those in the bound event (both can have no namespace).
				if ( !event.namespace_re || event.namespace_re.test( handleObj.namespace ) ) {

					event.handleObj = handleObj;
					event.data = handleObj.data;

					ret = ( (jQuery.event.special[ handleObj.origType ] || {}).handle || handleObj.handler )
							.apply( matched.elem, args );

					if ( ret !== undefined ) {
						if ( (event.result = ret) === false ) {
							event.preventDefault();
							event.stopPropagation();
						}
					}
				}
			}
		}

		// Call the postDispatch hook for the mapped type
		if ( special.postDispatch ) {
			special.postDispatch.call( this, event );
		}

		return event.result;
	},

	handlers: function( event, handlers ) {
		var i, matches, sel, handleObj,
			handlerQueue = [],
			delegateCount = handlers.delegateCount,
			cur = event.target;

		// Find delegate handlers
		// Black-hole SVG <use> instance trees (#13180)
		// Avoid non-left-click bubbling in Firefox (#3861)
		if ( delegateCount && cur.nodeType && (!event.button || event.type !== "click") ) {

			for ( ; cur !== this; cur = cur.parentNode || this ) {

				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
				if ( cur.disabled !== true || event.type !== "click" ) {
					matches = [];
					for ( i = 0; i < delegateCount; i++ ) {
						handleObj = handlers[ i ];

						// Don't conflict with Object.prototype properties (#13203)
						sel = handleObj.selector + " ";

						if ( matches[ sel ] === undefined ) {
							matches[ sel ] = handleObj.needsContext ?
								jQuery( sel, this ).index( cur ) >= 0 :
								jQuery.find( sel, this, null, [ cur ] ).length;
						}
						if ( matches[ sel ] ) {
							matches.push( handleObj );
						}
					}
					if ( matches.length ) {
						handlerQueue.push({ elem: cur, handlers: matches });
					}
				}
			}
		}

		// Add the remaining (directly-bound) handlers
		if ( delegateCount < handlers.length ) {
			handlerQueue.push({ elem: this, handlers: handlers.slice( delegateCount ) });
		}

		return handlerQueue;
	},

	// Includes some event props shared by KeyEvent and MouseEvent
	props: "altKey bubbles cancelable ctrlKey currentTarget eventPhase metaKey relatedTarget shiftKey target timeStamp view which".split(" "),

	fixHooks: {},

	keyHooks: {
		props: "char charCode key keyCode".split(" "),
		filter: function( event, original ) {

			// Add which for key events
			if ( event.which == null ) {
				event.which = original.charCode != null ? original.charCode : original.keyCode;
			}

			return event;
		}
	},

	mouseHooks: {
		props: "button buttons clientX clientY offsetX offsetY pageX pageY screenX screenY toElement".split(" "),
		filter: function( event, original ) {
			var eventDoc, doc, body,
				button = original.button;

			// Calculate pageX/Y if missing and clientX/Y available
			if ( event.pageX == null && original.clientX != null ) {
				eventDoc = event.target.ownerDocument || document;
				doc = eventDoc.documentElement;
				body = eventDoc.body;

				event.pageX = original.clientX + ( doc && doc.scrollLeft || body && body.scrollLeft || 0 ) - ( doc && doc.clientLeft || body && body.clientLeft || 0 );
				event.pageY = original.clientY + ( doc && doc.scrollTop  || body && body.scrollTop  || 0 ) - ( doc && doc.clientTop  || body && body.clientTop  || 0 );
			}

			// Add which for click: 1 === left; 2 === middle; 3 === right
			// Note: button is not normalized, so don't use it
			if ( !event.which && button !== undefined ) {
				event.which = ( button & 1 ? 1 : ( button & 2 ? 3 : ( button & 4 ? 2 : 0 ) ) );
			}

			return event;
		}
	},

	fix: function( event ) {
		if ( event[ jQuery.expando ] ) {
			return event;
		}

		// Create a writable copy of the event object and normalize some properties
		var i, prop, copy,
			type = event.type,
			originalEvent = event,
			fixHook = this.fixHooks[ type ];

		if ( !fixHook ) {
			this.fixHooks[ type ] = fixHook =
				rmouseEvent.test( type ) ? this.mouseHooks :
				rkeyEvent.test( type ) ? this.keyHooks :
				{};
		}
		copy = fixHook.props ? this.props.concat( fixHook.props ) : this.props;

		event = new jQuery.Event( originalEvent );

		i = copy.length;
		while ( i-- ) {
			prop = copy[ i ];
			event[ prop ] = originalEvent[ prop ];
		}

		// Support: Cordova 2.5 (WebKit) (#13255)
		// All events should have a target; Cordova deviceready doesn't
		if ( !event.target ) {
			event.target = document;
		}

		// Support: Safari 6.0+, Chrome<28
		// Target should not be a text node (#504, #13143)
		if ( event.target.nodeType === 3 ) {
			event.target = event.target.parentNode;
		}

		return fixHook.filter ? fixHook.filter( event, originalEvent ) : event;
	},

	special: {
		load: {
			// Prevent triggered image.load events from bubbling to window.load
			noBubble: true
		},
		focus: {
			// Fire native event if possible so blur/focus sequence is correct
			trigger: function() {
				if ( this !== safeActiveElement() && this.focus ) {
					this.focus();
					return false;
				}
			},
			delegateType: "focusin"
		},
		blur: {
			trigger: function() {
				if ( this === safeActiveElement() && this.blur ) {
					this.blur();
					return false;
				}
			},
			delegateType: "focusout"
		},
		click: {
			// For checkbox, fire native event so checked state will be right
			trigger: function() {
				if ( this.type === "checkbox" && this.click && jQuery.nodeName( this, "input" ) ) {
					this.click();
					return false;
				}
			},

			// For cross-browser consistency, don't fire native .click() on links
			_default: function( event ) {
				return jQuery.nodeName( event.target, "a" );
			}
		},

		beforeunload: {
			postDispatch: function( event ) {

				// Support: Firefox 20+
				// Firefox doesn't alert if the returnValue field is not set.
				if ( event.result !== undefined && event.originalEvent ) {
					event.originalEvent.returnValue = event.result;
				}
			}
		}
	},

	simulate: function( type, elem, event, bubble ) {
		// Piggyback on a donor event to simulate a different one.
		// Fake originalEvent to avoid donor's stopPropagation, but if the
		// simulated event prevents default then we do the same on the donor.
		var e = jQuery.extend(
			new jQuery.Event(),
			event,
			{
				type: type,
				isSimulated: true,
				originalEvent: {}
			}
		);
		if ( bubble ) {
			jQuery.event.trigger( e, null, elem );
		} else {
			jQuery.event.dispatch.call( elem, e );
		}
		if ( e.isDefaultPrevented() ) {
			event.preventDefault();
		}
	}
};

jQuery.removeEvent = function( elem, type, handle ) {
	if ( elem.removeEventListener ) {
		elem.removeEventListener( type, handle, false );
	}
};

jQuery.Event = function( src, props ) {
	// Allow instantiation without the 'new' keyword
	if ( !(this instanceof jQuery.Event) ) {
		return new jQuery.Event( src, props );
	}

	// Event object
	if ( src && src.type ) {
		this.originalEvent = src;
		this.type = src.type;

		// Events bubbling up the document may have been marked as prevented
		// by a handler lower down the tree; reflect the correct value.
		this.isDefaultPrevented = src.defaultPrevented ||
				src.defaultPrevented === undefined &&
				// Support: Android<4.0
				src.returnValue === false ?
			returnTrue :
			returnFalse;

	// Event type
	} else {
		this.type = src;
	}

	// Put explicitly provided properties onto the event object
	if ( props ) {
		jQuery.extend( this, props );
	}

	// Create a timestamp if incoming event doesn't have one
	this.timeStamp = src && src.timeStamp || jQuery.now();

	// Mark it as fixed
	this[ jQuery.expando ] = true;
};

// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
jQuery.Event.prototype = {
	isDefaultPrevented: returnFalse,
	isPropagationStopped: returnFalse,
	isImmediatePropagationStopped: returnFalse,

	preventDefault: function() {
		var e = this.originalEvent;

		this.isDefaultPrevented = returnTrue;

		if ( e && e.preventDefault ) {
			e.preventDefault();
		}
	},
	stopPropagation: function() {
		var e = this.originalEvent;

		this.isPropagationStopped = returnTrue;

		if ( e && e.stopPropagation ) {
			e.stopPropagation();
		}
	},
	stopImmediatePropagation: function() {
		var e = this.originalEvent;

		this.isImmediatePropagationStopped = returnTrue;

		if ( e && e.stopImmediatePropagation ) {
			e.stopImmediatePropagation();
		}

		this.stopPropagation();
	}
};

// Create mouseenter/leave events using mouseover/out and event-time checks
// Support: Chrome 15+
jQuery.each({
	mouseenter: "mouseover",
	mouseleave: "mouseout",
	pointerenter: "pointerover",
	pointerleave: "pointerout"
}, function( orig, fix ) {
	jQuery.event.special[ orig ] = {
		delegateType: fix,
		bindType: fix,

		handle: function( event ) {
			var ret,
				target = this,
				related = event.relatedTarget,
				handleObj = event.handleObj;

			// For mousenter/leave call the handler if related is outside the target.
			// NB: No relatedTarget if the mouse left/entered the browser window
			if ( !related || (related !== target && !jQuery.contains( target, related )) ) {
				event.type = handleObj.origType;
				ret = handleObj.handler.apply( this, arguments );
				event.type = fix;
			}
			return ret;
		}
	};
});

// Support: Firefox, Chrome, Safari
// Create "bubbling" focus and blur events
if ( !support.focusinBubbles ) {
	jQuery.each({ focus: "focusin", blur: "focusout" }, function( orig, fix ) {

		// Attach a single capturing handler on the document while someone wants focusin/focusout
		var handler = function( event ) {
				jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ), true );
			};

		jQuery.event.special[ fix ] = {
			setup: function() {
				var doc = this.ownerDocument || this,
					attaches = data_priv.access( doc, fix );

				if ( !attaches ) {
					doc.addEventListener( orig, handler, true );
				}
				data_priv.access( doc, fix, ( attaches || 0 ) + 1 );
			},
			teardown: function() {
				var doc = this.ownerDocument || this,
					attaches = data_priv.access( doc, fix ) - 1;

				if ( !attaches ) {
					doc.removeEventListener( orig, handler, true );
					data_priv.remove( doc, fix );

				} else {
					data_priv.access( doc, fix, attaches );
				}
			}
		};
	});
}

jQuery.fn.extend({

	on: function( types, selector, data, fn, /*INTERNAL*/ one ) {
		var origFn, type;

		// Types can be a map of types/handlers
		if ( typeof types === "object" ) {
			// ( types-Object, selector, data )
			if ( typeof selector !== "string" ) {
				// ( types-Object, data )
				data = data || selector;
				selector = undefined;
			}
			for ( type in types ) {
				this.on( type, selector, data, types[ type ], one );
			}
			return this;
		}

		if ( data == null && fn == null ) {
			// ( types, fn )
			fn = selector;
			data = selector = undefined;
		} else if ( fn == null ) {
			if ( typeof selector === "string" ) {
				// ( types, selector, fn )
				fn = data;
				data = undefined;
			} else {
				// ( types, data, fn )
				fn = data;
				data = selector;
				selector = undefined;
			}
		}
		if ( fn === false ) {
			fn = returnFalse;
		} else if ( !fn ) {
			return this;
		}

		if ( one === 1 ) {
			origFn = fn;
			fn = function( event ) {
				// Can use an empty set, since event contains the info
				jQuery().off( event );
				return origFn.apply( this, arguments );
			};
			// Use same guid so caller can remove using origFn
			fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
		}
		return this.each( function() {
			jQuery.event.add( this, types, fn, data, selector );
		});
	},
	one: function( types, selector, data, fn ) {
		return this.on( types, selector, data, fn, 1 );
	},
	off: function( types, selector, fn ) {
		var handleObj, type;
		if ( types && types.preventDefault && types.handleObj ) {
			// ( event )  dispatched jQuery.Event
			handleObj = types.handleObj;
			jQuery( types.delegateTarget ).off(
				handleObj.namespace ? handleObj.origType + "." + handleObj.namespace : handleObj.origType,
				handleObj.selector,
				handleObj.handler
			);
			return this;
		}
		if ( typeof types === "object" ) {
			// ( types-object [, selector] )
			for ( type in types ) {
				this.off( type, selector, types[ type ] );
			}
			return this;
		}
		if ( selector === false || typeof selector === "function" ) {
			// ( types [, fn] )
			fn = selector;
			selector = undefined;
		}
		if ( fn === false ) {
			fn = returnFalse;
		}
		return this.each(function() {
			jQuery.event.remove( this, types, fn, selector );
		});
	},

	trigger: function( type, data ) {
		return this.each(function() {
			jQuery.event.trigger( type, data, this );
		});
	},
	triggerHandler: function( type, data ) {
		var elem = this[0];
		if ( elem ) {
			return jQuery.event.trigger( type, data, elem, true );
		}
	}
});


var
	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi,
	rtagName = /<([\w:]+)/,
	rhtml = /<|&#?\w+;/,
	rnoInnerhtml = /<(?:script|style|link)/i,
	// checked="checked" or checked
	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
	rscriptType = /^$|\/(?:java|ecma)script/i,
	rscriptTypeMasked = /^true\/(.*)/,
	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g,

	// We have to close these tags to support XHTML (#13200)
	wrapMap = {

		// Support: IE9
		option: [ 1, "<select multiple='multiple'>", "</select>" ],

		thead: [ 1, "<table>", "</table>" ],
		col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
		td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],

		_default: [ 0, "", "" ]
	};

// Support: IE9
wrapMap.optgroup = wrapMap.option;

wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
wrapMap.th = wrapMap.td;

// Support: 1.x compatibility
// Manipulating tables requires a tbody
function manipulationTarget( elem, content ) {
	return jQuery.nodeName( elem, "table" ) &&
		jQuery.nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ?

		elem.getElementsByTagName("tbody")[0] ||
			elem.appendChild( elem.ownerDocument.createElement("tbody") ) :
		elem;
}

// Replace/restore the type attribute of script elements for safe DOM manipulation
function disableScript( elem ) {
	elem.type = (elem.getAttribute("type") !== null) + "/" + elem.type;
	return elem;
}
function restoreScript( elem ) {
	var match = rscriptTypeMasked.exec( elem.type );

	if ( match ) {
		elem.type = match[ 1 ];
	} else {
		elem.removeAttribute("type");
	}

	return elem;
}

// Mark scripts as having already been evaluated
function setGlobalEval( elems, refElements ) {
	var i = 0,
		l = elems.length;

	for ( ; i < l; i++ ) {
		data_priv.set(
			elems[ i ], "globalEval", !refElements || data_priv.get( refElements[ i ], "globalEval" )
		);
	}
}

function cloneCopyEvent( src, dest ) {
	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;

	if ( dest.nodeType !== 1 ) {
		return;
	}

	// 1. Copy private data: events, handlers, etc.
	if ( data_priv.hasData( src ) ) {
		pdataOld = data_priv.access( src );
		pdataCur = data_priv.set( dest, pdataOld );
		events = pdataOld.events;

		if ( events ) {
			delete pdataCur.handle;
			pdataCur.events = {};

			for ( type in events ) {
				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
					jQuery.event.add( dest, type, events[ type ][ i ] );
				}
			}
		}
	}

	// 2. Copy user data
	if ( data_user.hasData( src ) ) {
		udataOld = data_user.access( src );
		udataCur = jQuery.extend( {}, udataOld );

		data_user.set( dest, udataCur );
	}
}

function getAll( context, tag ) {
	var ret = context.getElementsByTagName ? context.getElementsByTagName( tag || "*" ) :
			context.querySelectorAll ? context.querySelectorAll( tag || "*" ) :
			[];

	return tag === undefined || tag && jQuery.nodeName( context, tag ) ?
		jQuery.merge( [ context ], ret ) :
		ret;
}

// Fix IE bugs, see support tests
function fixInput( src, dest ) {
	var nodeName = dest.nodeName.toLowerCase();

	// Fails to persist the checked state of a cloned checkbox or radio button.
	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
		dest.checked = src.checked;

	// Fails to return the selected option to the default selected state when cloning options
	} else if ( nodeName === "input" || nodeName === "textarea" ) {
		dest.defaultValue = src.defaultValue;
	}
}

jQuery.extend({
	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
		var i, l, srcElements, destElements,
			clone = elem.cloneNode( true ),
			inPage = jQuery.contains( elem.ownerDocument, elem );

		// Fix IE cloning issues
		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
				!jQuery.isXMLDoc( elem ) ) {

			// We eschew Sizzle here for performance reasons: http://jsperf.com/getall-vs-sizzle/2
			destElements = getAll( clone );
			srcElements = getAll( elem );

			for ( i = 0, l = srcElements.length; i < l; i++ ) {
				fixInput( srcElements[ i ], destElements[ i ] );
			}
		}

		// Copy the events from the original to the clone
		if ( dataAndEvents ) {
			if ( deepDataAndEvents ) {
				srcElements = srcElements || getAll( elem );
				destElements = destElements || getAll( clone );

				for ( i = 0, l = srcElements.length; i < l; i++ ) {
					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
				}
			} else {
				cloneCopyEvent( elem, clone );
			}
		}

		// Preserve script evaluation history
		destElements = getAll( clone, "script" );
		if ( destElements.length > 0 ) {
			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
		}

		// Return the cloned set
		return clone;
	},

	buildFragment: function( elems, context, scripts, selection ) {
		var elem, tmp, tag, wrap, contains, j,
			fragment = context.createDocumentFragment(),
			nodes = [],
			i = 0,
			l = elems.length;

		for ( ; i < l; i++ ) {
			elem = elems[ i ];

			if ( elem || elem === 0 ) {

				// Add nodes directly
				if ( jQuery.type( elem ) === "object" ) {
					// Support: QtWebKit, PhantomJS
					// push.apply(_, arraylike) throws on ancient WebKit
					jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );

				// Convert non-html into a text node
				} else if ( !rhtml.test( elem ) ) {
					nodes.push( context.createTextNode( elem ) );

				// Convert html into DOM nodes
				} else {
					tmp = tmp || fragment.appendChild( context.createElement("div") );

					// Deserialize a standard representation
					tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
					wrap = wrapMap[ tag ] || wrapMap._default;
					tmp.innerHTML = wrap[ 1 ] + elem.replace( rxhtmlTag, "<$1></$2>" ) + wrap[ 2 ];

					// Descend through wrappers to the right content
					j = wrap[ 0 ];
					while ( j-- ) {
						tmp = tmp.lastChild;
					}

					// Support: QtWebKit, PhantomJS
					// push.apply(_, arraylike) throws on ancient WebKit
					jQuery.merge( nodes, tmp.childNodes );

					// Remember the top-level container
					tmp = fragment.firstChild;

					// Ensure the created nodes are orphaned (#12392)
					tmp.textContent = "";
				}
			}
		}

		// Remove wrapper from fragment
		fragment.textContent = "";

		i = 0;
		while ( (elem = nodes[ i++ ]) ) {

			// #4087 - If origin and destination elements are the same, and this is
			// that element, do not do anything
			if ( selection && jQuery.inArray( elem, selection ) !== -1 ) {
				continue;
			}

			contains = jQuery.contains( elem.ownerDocument, elem );

			// Append to fragment
			tmp = getAll( fragment.appendChild( elem ), "script" );

			// Preserve script evaluation history
			if ( contains ) {
				setGlobalEval( tmp );
			}

			// Capture executables
			if ( scripts ) {
				j = 0;
				while ( (elem = tmp[ j++ ]) ) {
					if ( rscriptType.test( elem.type || "" ) ) {
						scripts.push( elem );
					}
				}
			}
		}

		return fragment;
	},

	cleanData: function( elems ) {
		var data, elem, type, key,
			special = jQuery.event.special,
			i = 0;

		for ( ; (elem = elems[ i ]) !== undefined; i++ ) {
			if ( jQuery.acceptData( elem ) ) {
				key = elem[ data_priv.expando ];

				if ( key && (data = data_priv.cache[ key ]) ) {
					if ( data.events ) {
						for ( type in data.events ) {
							if ( special[ type ] ) {
								jQuery.event.remove( elem, type );

							// This is a shortcut to avoid jQuery.event.remove's overhead
							} else {
								jQuery.removeEvent( elem, type, data.handle );
							}
						}
					}
					if ( data_priv.cache[ key ] ) {
						// Discard any remaining `private` data
						delete data_priv.cache[ key ];
					}
				}
			}
			// Discard any remaining `user` data
			delete data_user.cache[ elem[ data_user.expando ] ];
		}
	}
});

jQuery.fn.extend({
	text: function( value ) {
		return access( this, function( value ) {
			return value === undefined ?
				jQuery.text( this ) :
				this.empty().each(function() {
					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
						this.textContent = value;
					}
				});
		}, null, value, arguments.length );
	},

	append: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
				var target = manipulationTarget( this, elem );
				target.appendChild( elem );
			}
		});
	},

	prepend: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
				var target = manipulationTarget( this, elem );
				target.insertBefore( elem, target.firstChild );
			}
		});
	},

	before: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.parentNode ) {
				this.parentNode.insertBefore( elem, this );
			}
		});
	},

	after: function() {
		return this.domManip( arguments, function( elem ) {
			if ( this.parentNode ) {
				this.parentNode.insertBefore( elem, this.nextSibling );
			}
		});
	},

	remove: function( selector, keepData /* Internal Use Only */ ) {
		var elem,
			elems = selector ? jQuery.filter( selector, this ) : this,
			i = 0;

		for ( ; (elem = elems[i]) != null; i++ ) {
			if ( !keepData && elem.nodeType === 1 ) {
				jQuery.cleanData( getAll( elem ) );
			}

			if ( elem.parentNode ) {
				if ( keepData && jQuery.contains( elem.ownerDocument, elem ) ) {
					setGlobalEval( getAll( elem, "script" ) );
				}
				elem.parentNode.removeChild( elem );
			}
		}

		return this;
	},

	empty: function() {
		var elem,
			i = 0;

		for ( ; (elem = this[i]) != null; i++ ) {
			if ( elem.nodeType === 1 ) {

				// Prevent memory leaks
				jQuery.cleanData( getAll( elem, false ) );

				// Remove any remaining nodes
				elem.textContent = "";
			}
		}

		return this;
	},

	clone: function( dataAndEvents, deepDataAndEvents ) {
		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;

		return this.map(function() {
			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
		});
	},

	html: function( value ) {
		return access( this, function( value ) {
			var elem = this[ 0 ] || {},
				i = 0,
				l = this.length;

			if ( value === undefined && elem.nodeType === 1 ) {
				return elem.innerHTML;
			}

			// See if we can take a shortcut and just use innerHTML
			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {

				value = value.replace( rxhtmlTag, "<$1></$2>" );

				try {
					for ( ; i < l; i++ ) {
						elem = this[ i ] || {};

						// Remove element nodes and prevent memory leaks
						if ( elem.nodeType === 1 ) {
							jQuery.cleanData( getAll( elem, false ) );
							elem.innerHTML = value;
						}
					}

					elem = 0;

				// If using innerHTML throws an exception, use the fallback method
				} catch( e ) {}
			}

			if ( elem ) {
				this.empty().append( value );
			}
		}, null, value, arguments.length );
	},

	replaceWith: function() {
		var arg = arguments[ 0 ];

		// Make the changes, replacing each context element with the new content
		this.domManip( arguments, function( elem ) {
			arg = this.parentNode;

			jQuery.cleanData( getAll( this ) );

			if ( arg ) {
				arg.replaceChild( elem, this );
			}
		});

		// Force removal if there was no new content (e.g., from empty arguments)
		return arg && (arg.length || arg.nodeType) ? this : this.remove();
	},

	detach: function( selector ) {
		return this.remove( selector, true );
	},

	domManip: function( args, callback ) {

		// Flatten any nested arrays
		args = concat.apply( [], args );

		var fragment, first, scripts, hasScripts, node, doc,
			i = 0,
			l = this.length,
			set = this,
			iNoClone = l - 1,
			value = args[ 0 ],
			isFunction = jQuery.isFunction( value );

		// We can't cloneNode fragments that contain checked, in WebKit
		if ( isFunction ||
				( l > 1 && typeof value === "string" &&
					!support.checkClone && rchecked.test( value ) ) ) {
			return this.each(function( index ) {
				var self = set.eq( index );
				if ( isFunction ) {
					args[ 0 ] = value.call( this, index, self.html() );
				}
				self.domManip( args, callback );
			});
		}

		if ( l ) {
			fragment = jQuery.buildFragment( args, this[ 0 ].ownerDocument, false, this );
			first = fragment.firstChild;

			if ( fragment.childNodes.length === 1 ) {
				fragment = first;
			}

			if ( first ) {
				scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
				hasScripts = scripts.length;

				// Use the original fragment for the last item instead of the first because it can end up
				// being emptied incorrectly in certain situations (#8070).
				for ( ; i < l; i++ ) {
					node = fragment;

					if ( i !== iNoClone ) {
						node = jQuery.clone( node, true, true );

						// Keep references to cloned scripts for later restoration
						if ( hasScripts ) {
							// Support: QtWebKit
							// jQuery.merge because push.apply(_, arraylike) throws
							jQuery.merge( scripts, getAll( node, "script" ) );
						}
					}

					callback.call( this[ i ], node, i );
				}

				if ( hasScripts ) {
					doc = scripts[ scripts.length - 1 ].ownerDocument;

					// Reenable scripts
					jQuery.map( scripts, restoreScript );

					// Evaluate executable scripts on first document insertion
					for ( i = 0; i < hasScripts; i++ ) {
						node = scripts[ i ];
						if ( rscriptType.test( node.type || "" ) &&
							!data_priv.access( node, "globalEval" ) && jQuery.contains( doc, node ) ) {

							if ( node.src ) {
								// Optional AJAX dependency, but won't run scripts if not present
								if ( jQuery._evalUrl ) {
									jQuery._evalUrl( node.src );
								}
							} else {
								jQuery.globalEval( node.textContent.replace( rcleanScript, "" ) );
							}
						}
					}
				}
			}
		}

		return this;
	}
});

jQuery.each({
	appendTo: "append",
	prependTo: "prepend",
	insertBefore: "before",
	insertAfter: "after",
	replaceAll: "replaceWith"
}, function( name, original ) {
	jQuery.fn[ name ] = function( selector ) {
		var elems,
			ret = [],
			insert = jQuery( selector ),
			last = insert.length - 1,
			i = 0;

		for ( ; i <= last; i++ ) {
			elems = i === last ? this : this.clone( true );
			jQuery( insert[ i ] )[ original ]( elems );

			// Support: QtWebKit
			// .get() because push.apply(_, arraylike) throws
			push.apply( ret, elems.get() );
		}

		return this.pushStack( ret );
	};
});


var iframe,
	elemdisplay = {};

/**
 * Retrieve the actual display of a element
 * @param {String} name nodeName of the element
 * @param {Object} doc Document object
 */
// Called only from within defaultDisplay
function actualDisplay( name, doc ) {
	var style,
		elem = jQuery( doc.createElement( name ) ).appendTo( doc.body ),

		// getDefaultComputedStyle might be reliably used only on attached element
		display = window.getDefaultComputedStyle && ( style = window.getDefaultComputedStyle( elem[ 0 ] ) ) ?

			// Use of this method is a temporary fix (more like optimization) until something better comes along,
			// since it was removed from specification and supported only in FF
			style.display : jQuery.css( elem[ 0 ], "display" );

	// We don't have any data stored on the element,
	// so use "detach" method as fast way to get rid of the element
	elem.detach();

	return display;
}

/**
 * Try to determine the default display value of an element
 * @param {String} nodeName
 */
function defaultDisplay( nodeName ) {
	var doc = document,
		display = elemdisplay[ nodeName ];

	if ( !display ) {
		display = actualDisplay( nodeName, doc );

		// If the simple way fails, read from inside an iframe
		if ( display === "none" || !display ) {

			// Use the already-created iframe if possible
			iframe = (iframe || jQuery( "<iframe frameborder='0' width='0' height='0'/>" )).appendTo( doc.documentElement );

			// Always write a new HTML skeleton so Webkit and Firefox don't choke on reuse
			doc = iframe[ 0 ].contentDocument;

			// Support: IE
			doc.write();
			doc.close();

			display = actualDisplay( nodeName, doc );
			iframe.detach();
		}

		// Store the correct default display
		elemdisplay[ nodeName ] = display;
	}

	return display;
}
var rmargin = (/^margin/);

var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );

var getStyles = function( elem ) {
		// Support: IE<=11+, Firefox<=30+ (#15098, #14150)
		// IE throws on elements created in popups
		// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
		if ( elem.ownerDocument.defaultView.opener ) {
			return elem.ownerDocument.defaultView.getComputedStyle( elem, null );
		}

		return window.getComputedStyle( elem, null );
	};



function curCSS( elem, name, computed ) {
	var width, minWidth, maxWidth, ret,
		style = elem.style;

	computed = computed || getStyles( elem );

	// Support: IE9
	// getPropertyValue is only needed for .css('filter') (#12537)
	if ( computed ) {
		ret = computed.getPropertyValue( name ) || computed[ name ];
	}

	if ( computed ) {

		if ( ret === "" && !jQuery.contains( elem.ownerDocument, elem ) ) {
			ret = jQuery.style( elem, name );
		}

		// Support: iOS < 6
		// A tribute to the "awesome hack by Dean Edwards"
		// iOS < 6 (at least) returns percentage for a larger set of values, but width seems to be reliably pixels
		// this is against the CSSOM draft spec: http://dev.w3.org/csswg/cssom/#resolved-values
		if ( rnumnonpx.test( ret ) && rmargin.test( name ) ) {

			// Remember the original values
			width = style.width;
			minWidth = style.minWidth;
			maxWidth = style.maxWidth;

			// Put in the new values to get a computed value out
			style.minWidth = style.maxWidth = style.width = ret;
			ret = computed.width;

			// Revert the changed values
			style.width = width;
			style.minWidth = minWidth;
			style.maxWidth = maxWidth;
		}
	}

	return ret !== undefined ?
		// Support: IE
		// IE returns zIndex value as an integer.
		ret + "" :
		ret;
}


function addGetHookIf( conditionFn, hookFn ) {
	// Define the hook, we'll check on the first run if it's really needed.
	return {
		get: function() {
			if ( conditionFn() ) {
				// Hook not needed (or it's not possible to use it due
				// to missing dependency), remove it.
				delete this.get;
				return;
			}

			// Hook needed; redefine it so that the support test is not executed again.
			return (this.get = hookFn).apply( this, arguments );
		}
	};
}


(function() {
	var pixelPositionVal, boxSizingReliableVal,
		docElem = document.documentElement,
		container = document.createElement( "div" ),
		div = document.createElement( "div" );

	if ( !div.style ) {
		return;
	}

	// Support: IE9-11+
	// Style of cloned element affects source element cloned (#8908)
	div.style.backgroundClip = "content-box";
	div.cloneNode( true ).style.backgroundClip = "";
	support.clearCloneStyle = div.style.backgroundClip === "content-box";

	container.style.cssText = "border:0;width:0;height:0;top:0;left:-9999px;margin-top:1px;" +
		"position:absolute";
	container.appendChild( div );

	// Executing both pixelPosition & boxSizingReliable tests require only one layout
	// so they're executed at the same time to save the second computation.
	function computePixelPositionAndBoxSizingReliable() {
		div.style.cssText =
			// Support: Firefox<29, Android 2.3
			// Vendor-prefix box-sizing
			"-webkit-box-sizing:border-box;-moz-box-sizing:border-box;" +
			"box-sizing:border-box;display:block;margin-top:1%;top:1%;" +
			"border:1px;padding:1px;width:4px;position:absolute";
		div.innerHTML = "";
		docElem.appendChild( container );

		var divStyle = window.getComputedStyle( div, null );
		pixelPositionVal = divStyle.top !== "1%";
		boxSizingReliableVal = divStyle.width === "4px";

		docElem.removeChild( container );
	}

	// Support: node.js jsdom
	// Don't assume that getComputedStyle is a property of the global object
	if ( window.getComputedStyle ) {
		jQuery.extend( support, {
			pixelPosition: function() {

				// This test is executed only once but we still do memoizing
				// since we can use the boxSizingReliable pre-computing.
				// No need to check if the test was already performed, though.
				computePixelPositionAndBoxSizingReliable();
				return pixelPositionVal;
			},
			boxSizingReliable: function() {
				if ( boxSizingReliableVal == null ) {
					computePixelPositionAndBoxSizingReliable();
				}
				return boxSizingReliableVal;
			},
			reliableMarginRight: function() {

				// Support: Android 2.3
				// Check if div with explicit width and no margin-right incorrectly
				// gets computed margin-right based on width of container. (#3333)
				// WebKit Bug 13343 - getComputedStyle returns wrong value for margin-right
				// This support function is only executed once so no memoizing is needed.
				var ret,
					marginDiv = div.appendChild( document.createElement( "div" ) );

				// Reset CSS: box-sizing; display; margin; border; padding
				marginDiv.style.cssText = div.style.cssText =
					// Support: Firefox<29, Android 2.3
					// Vendor-prefix box-sizing
					"-webkit-box-sizing:content-box;-moz-box-sizing:content-box;" +
					"box-sizing:content-box;display:block;margin:0;border:0;padding:0";
				marginDiv.style.marginRight = marginDiv.style.width = "0";
				div.style.width = "1px";
				docElem.appendChild( container );

				ret = !parseFloat( window.getComputedStyle( marginDiv, null ).marginRight );

				docElem.removeChild( container );
				div.removeChild( marginDiv );

				return ret;
			}
		});
	}
})();


// A method for quickly swapping in/out CSS properties to get correct calculations.
jQuery.swap = function( elem, options, callback, args ) {
	var ret, name,
		old = {};

	// Remember the old values, and insert the new ones
	for ( name in options ) {
		old[ name ] = elem.style[ name ];
		elem.style[ name ] = options[ name ];
	}

	ret = callback.apply( elem, args || [] );

	// Revert the old values
	for ( name in options ) {
		elem.style[ name ] = old[ name ];
	}

	return ret;
};


var
	// Swappable if display is none or starts with table except "table", "table-cell", or "table-caption"
	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
	rnumsplit = new RegExp( "^(" + pnum + ")(.*)$", "i" ),
	rrelNum = new RegExp( "^([+-])=(" + pnum + ")", "i" ),

	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
	cssNormalTransform = {
		letterSpacing: "0",
		fontWeight: "400"
	},

	cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];

// Return a css property mapped to a potentially vendor prefixed property
function vendorPropName( style, name ) {

	// Shortcut for names that are not vendor prefixed
	if ( name in style ) {
		return name;
	}

	// Check for vendor prefixed names
	var capName = name[0].toUpperCase() + name.slice(1),
		origName = name,
		i = cssPrefixes.length;

	while ( i-- ) {
		name = cssPrefixes[ i ] + capName;
		if ( name in style ) {
			return name;
		}
	}

	return origName;
}

function setPositiveNumber( elem, value, subtract ) {
	var matches = rnumsplit.exec( value );
	return matches ?
		// Guard against undefined "subtract", e.g., when used as in cssHooks
		Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
		value;
}

function augmentWidthOrHeight( elem, name, extra, isBorderBox, styles ) {
	var i = extra === ( isBorderBox ? "border" : "content" ) ?
		// If we already have the right measurement, avoid augmentation
		4 :
		// Otherwise initialize for horizontal or vertical properties
		name === "width" ? 1 : 0,

		val = 0;

	for ( ; i < 4; i += 2 ) {
		// Both box models exclude margin, so add it if we want it
		if ( extra === "margin" ) {
			val += jQuery.css( elem, extra + cssExpand[ i ], true, styles );
		}

		if ( isBorderBox ) {
			// border-box includes padding, so remove it if we want content
			if ( extra === "content" ) {
				val -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
			}

			// At this point, extra isn't border nor margin, so remove border
			if ( extra !== "margin" ) {
				val -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
			}
		} else {
			// At this point, extra isn't content, so add padding
			val += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );

			// At this point, extra isn't content nor padding, so add border
			if ( extra !== "padding" ) {
				val += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
			}
		}
	}

	return val;
}

function getWidthOrHeight( elem, name, extra ) {

	// Start with offset property, which is equivalent to the border-box value
	var valueIsBorderBox = true,
		val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
		styles = getStyles( elem ),
		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";

	// Some non-html elements return undefined for offsetWidth, so check for null/undefined
	// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
	// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
	if ( val <= 0 || val == null ) {
		// Fall back to computed then uncomputed css if necessary
		val = curCSS( elem, name, styles );
		if ( val < 0 || val == null ) {
			val = elem.style[ name ];
		}

		// Computed unit is not pixels. Stop here and return.
		if ( rnumnonpx.test(val) ) {
			return val;
		}

		// Check for style in case a browser which returns unreliable values
		// for getComputedStyle silently falls back to the reliable elem.style
		valueIsBorderBox = isBorderBox &&
			( support.boxSizingReliable() || val === elem.style[ name ] );

		// Normalize "", auto, and prepare for extra
		val = parseFloat( val ) || 0;
	}

	// Use the active box-sizing model to add/subtract irrelevant styles
	return ( val +
		augmentWidthOrHeight(
			elem,
			name,
			extra || ( isBorderBox ? "border" : "content" ),
			valueIsBorderBox,
			styles
		)
	) + "px";
}

function showHide( elements, show ) {
	var display, elem, hidden,
		values = [],
		index = 0,
		length = elements.length;

	for ( ; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}

		values[ index ] = data_priv.get( elem, "olddisplay" );
		display = elem.style.display;
		if ( show ) {
			// Reset the inline display of this element to learn if it is
			// being hidden by cascaded rules or not
			if ( !values[ index ] && display === "none" ) {
				elem.style.display = "";
			}

			// Set elements which have been overridden with display: none
			// in a stylesheet to whatever the default browser style is
			// for such an element
			if ( elem.style.display === "" && isHidden( elem ) ) {
				values[ index ] = data_priv.access( elem, "olddisplay", defaultDisplay(elem.nodeName) );
			}
		} else {
			hidden = isHidden( elem );

			if ( display !== "none" || !hidden ) {
				data_priv.set( elem, "olddisplay", hidden ? display : jQuery.css( elem, "display" ) );
			}
		}
	}

	// Set the display of most of the elements in a second loop
	// to avoid the constant reflow
	for ( index = 0; index < length; index++ ) {
		elem = elements[ index ];
		if ( !elem.style ) {
			continue;
		}
		if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
			elem.style.display = show ? values[ index ] || "" : "none";
		}
	}

	return elements;
}

jQuery.extend({

	// Add in style property hooks for overriding the default
	// behavior of getting and setting a style property
	cssHooks: {
		opacity: {
			get: function( elem, computed ) {
				if ( computed ) {

					// We should always get a number back from opacity
					var ret = curCSS( elem, "opacity" );
					return ret === "" ? "1" : ret;
				}
			}
		}
	},

	// Don't automatically add "px" to these possibly-unitless properties
	cssNumber: {
		"columnCount": true,
		"fillOpacity": true,
		"flexGrow": true,
		"flexShrink": true,
		"fontWeight": true,
		"lineHeight": true,
		"opacity": true,
		"order": true,
		"orphans": true,
		"widows": true,
		"zIndex": true,
		"zoom": true
	},

	// Add in properties whose names you wish to fix before
	// setting or getting the value
	cssProps: {
		"float": "cssFloat"
	},

	// Get and set the style property on a DOM Node
	style: function( elem, name, value, extra ) {

		// Don't set styles on text and comment nodes
		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
			return;
		}

		// Make sure that we're working with the right name
		var ret, type, hooks,
			origName = jQuery.camelCase( name ),
			style = elem.style;

		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( style, origName ) );

		// Gets hook for the prefixed version, then unprefixed version
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// Check if we're setting a value
		if ( value !== undefined ) {
			type = typeof value;

			// Convert "+=" or "-=" to relative numbers (#7345)
			if ( type === "string" && (ret = rrelNum.exec( value )) ) {
				value = ( ret[1] + 1 ) * ret[2] + parseFloat( jQuery.css( elem, name ) );
				// Fixes bug #9237
				type = "number";
			}

			// Make sure that null and NaN values aren't set (#7116)
			if ( value == null || value !== value ) {
				return;
			}

			// If a number, add 'px' to the (except for certain CSS properties)
			if ( type === "number" && !jQuery.cssNumber[ origName ] ) {
				value += "px";
			}

			// Support: IE9-11+
			// background-* props affect original clone's values
			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
				style[ name ] = "inherit";
			}

			// If a hook was provided, use that value, otherwise just set the specified value
			if ( !hooks || !("set" in hooks) || (value = hooks.set( elem, value, extra )) !== undefined ) {
				style[ name ] = value;
			}

		} else {
			// If a hook was provided get the non-computed value from there
			if ( hooks && "get" in hooks && (ret = hooks.get( elem, false, extra )) !== undefined ) {
				return ret;
			}

			// Otherwise just get the value from the style object
			return style[ name ];
		}
	},

	css: function( elem, name, extra, styles ) {
		var val, num, hooks,
			origName = jQuery.camelCase( name );

		// Make sure that we're working with the right name
		name = jQuery.cssProps[ origName ] || ( jQuery.cssProps[ origName ] = vendorPropName( elem.style, origName ) );

		// Try prefixed name followed by the unprefixed name
		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];

		// If a hook was provided get the computed value from there
		if ( hooks && "get" in hooks ) {
			val = hooks.get( elem, true, extra );
		}

		// Otherwise, if a way to get the computed value exists, use that
		if ( val === undefined ) {
			val = curCSS( elem, name, styles );
		}

		// Convert "normal" to computed value
		if ( val === "normal" && name in cssNormalTransform ) {
			val = cssNormalTransform[ name ];
		}

		// Make numeric if forced or a qualifier was provided and val looks numeric
		if ( extra === "" || extra ) {
			num = parseFloat( val );
			return extra === true || jQuery.isNumeric( num ) ? num || 0 : val;
		}
		return val;
	}
});

jQuery.each([ "height", "width" ], function( i, name ) {
	jQuery.cssHooks[ name ] = {
		get: function( elem, computed, extra ) {
			if ( computed ) {

				// Certain elements can have dimension info if we invisibly show them
				// but it must have a current display style that would benefit
				return rdisplayswap.test( jQuery.css( elem, "display" ) ) && elem.offsetWidth === 0 ?
					jQuery.swap( elem, cssShow, function() {
						return getWidthOrHeight( elem, name, extra );
					}) :
					getWidthOrHeight( elem, name, extra );
			}
		},

		set: function( elem, value, extra ) {
			var styles = extra && getStyles( elem );
			return setPositiveNumber( elem, value, extra ?
				augmentWidthOrHeight(
					elem,
					name,
					extra,
					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
					styles
				) : 0
			);
		}
	};
});

// Support: Android 2.3
jQuery.cssHooks.marginRight = addGetHookIf( support.reliableMarginRight,
	function( elem, computed ) {
		if ( computed ) {
			return jQuery.swap( elem, { "display": "inline-block" },
				curCSS, [ elem, "marginRight" ] );
		}
	}
);

// These hooks are used by animate to expand properties
jQuery.each({
	margin: "",
	padding: "",
	border: "Width"
}, function( prefix, suffix ) {
	jQuery.cssHooks[ prefix + suffix ] = {
		expand: function( value ) {
			var i = 0,
				expanded = {},

				// Assumes a single number if not a string
				parts = typeof value === "string" ? value.split(" ") : [ value ];

			for ( ; i < 4; i++ ) {
				expanded[ prefix + cssExpand[ i ] + suffix ] =
					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
			}

			return expanded;
		}
	};

	if ( !rmargin.test( prefix ) ) {
		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
	}
});

jQuery.fn.extend({
	css: function( name, value ) {
		return access( this, function( elem, name, value ) {
			var styles, len,
				map = {},
				i = 0;

			if ( jQuery.isArray( name ) ) {
				styles = getStyles( elem );
				len = name.length;

				for ( ; i < len; i++ ) {
					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
				}

				return map;
			}

			return value !== undefined ?
				jQuery.style( elem, name, value ) :
				jQuery.css( elem, name );
		}, name, value, arguments.length > 1 );
	},
	show: function() {
		return showHide( this, true );
	},
	hide: function() {
		return showHide( this );
	},
	toggle: function( state ) {
		if ( typeof state === "boolean" ) {
			return state ? this.show() : this.hide();
		}

		return this.each(function() {
			if ( isHidden( this ) ) {
				jQuery( this ).show();
			} else {
				jQuery( this ).hide();
			}
		});
	}
});


function Tween( elem, options, prop, end, easing ) {
	return new Tween.prototype.init( elem, options, prop, end, easing );
}
jQuery.Tween = Tween;

Tween.prototype = {
	constructor: Tween,
	init: function( elem, options, prop, end, easing, unit ) {
		this.elem = elem;
		this.prop = prop;
		this.easing = easing || "swing";
		this.options = options;
		this.start = this.now = this.cur();
		this.end = end;
		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
	},
	cur: function() {
		var hooks = Tween.propHooks[ this.prop ];

		return hooks && hooks.get ?
			hooks.get( this ) :
			Tween.propHooks._default.get( this );
	},
	run: function( percent ) {
		var eased,
			hooks = Tween.propHooks[ this.prop ];

		if ( this.options.duration ) {
			this.pos = eased = jQuery.easing[ this.easing ](
				percent, this.options.duration * percent, 0, 1, this.options.duration
			);
		} else {
			this.pos = eased = percent;
		}
		this.now = ( this.end - this.start ) * eased + this.start;

		if ( this.options.step ) {
			this.options.step.call( this.elem, this.now, this );
		}

		if ( hooks && hooks.set ) {
			hooks.set( this );
		} else {
			Tween.propHooks._default.set( this );
		}
		return this;
	}
};

Tween.prototype.init.prototype = Tween.prototype;

Tween.propHooks = {
	_default: {
		get: function( tween ) {
			var result;

			if ( tween.elem[ tween.prop ] != null &&
				(!tween.elem.style || tween.elem.style[ tween.prop ] == null) ) {
				return tween.elem[ tween.prop ];
			}

			// Passing an empty string as a 3rd parameter to .css will automatically
			// attempt a parseFloat and fallback to a string if the parse fails.
			// Simple values such as "10px" are parsed to Float;
			// complex values such as "rotate(1rad)" are returned as-is.
			result = jQuery.css( tween.elem, tween.prop, "" );
			// Empty strings, null, undefined and "auto" are converted to 0.
			return !result || result === "auto" ? 0 : result;
		},
		set: function( tween ) {
			// Use step hook for back compat.
			// Use cssHook if its there.
			// Use .style if available and use plain properties where available.
			if ( jQuery.fx.step[ tween.prop ] ) {
				jQuery.fx.step[ tween.prop ]( tween );
			} else if ( tween.elem.style && ( tween.elem.style[ jQuery.cssProps[ tween.prop ] ] != null || jQuery.cssHooks[ tween.prop ] ) ) {
				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
			} else {
				tween.elem[ tween.prop ] = tween.now;
			}
		}
	}
};

// Support: IE9
// Panic based approach to setting things on disconnected nodes
Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
	set: function( tween ) {
		if ( tween.elem.nodeType && tween.elem.parentNode ) {
			tween.elem[ tween.prop ] = tween.now;
		}
	}
};

jQuery.easing = {
	linear: function( p ) {
		return p;
	},
	swing: function( p ) {
		return 0.5 - Math.cos( p * Math.PI ) / 2;
	}
};

jQuery.fx = Tween.prototype.init;

// Back Compat <1.8 extension point
jQuery.fx.step = {};




var
	fxNow, timerId,
	rfxtypes = /^(?:toggle|show|hide)$/,
	rfxnum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" ),
	rrun = /queueHooks$/,
	animationPrefilters = [ defaultPrefilter ],
	tweeners = {
		"*": [ function( prop, value ) {
			var tween = this.createTween( prop, value ),
				target = tween.cur(),
				parts = rfxnum.exec( value ),
				unit = parts && parts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),

				// Starting value computation is required for potential unit mismatches
				start = ( jQuery.cssNumber[ prop ] || unit !== "px" && +target ) &&
					rfxnum.exec( jQuery.css( tween.elem, prop ) ),
				scale = 1,
				maxIterations = 20;

			if ( start && start[ 3 ] !== unit ) {
				// Trust units reported by jQuery.css
				unit = unit || start[ 3 ];

				// Make sure we update the tween properties later on
				parts = parts || [];

				// Iteratively approximate from a nonzero starting point
				start = +target || 1;

				do {
					// If previous iteration zeroed out, double until we get *something*.
					// Use string for doubling so we don't accidentally see scale as unchanged below
					scale = scale || ".5";

					// Adjust and apply
					start = start / scale;
					jQuery.style( tween.elem, prop, start + unit );

				// Update scale, tolerating zero or NaN from tween.cur(),
				// break the loop if scale is unchanged or perfect, or if we've just had enough
				} while ( scale !== (scale = tween.cur() / target) && scale !== 1 && --maxIterations );
			}

			// Update tween properties
			if ( parts ) {
				start = tween.start = +start || +target || 0;
				tween.unit = unit;
				// If a +=/-= token was provided, we're doing a relative animation
				tween.end = parts[ 1 ] ?
					start + ( parts[ 1 ] + 1 ) * parts[ 2 ] :
					+parts[ 2 ];
			}

			return tween;
		} ]
	};

// Animations created synchronously will run synchronously
function createFxNow() {
	setTimeout(function() {
		fxNow = undefined;
	});
	return ( fxNow = jQuery.now() );
}

// Generate parameters to create a standard animation
function genFx( type, includeWidth ) {
	var which,
		i = 0,
		attrs = { height: type };

	// If we include width, step value is 1 to do all cssExpand values,
	// otherwise step value is 2 to skip over Left and Right
	includeWidth = includeWidth ? 1 : 0;
	for ( ; i < 4 ; i += 2 - includeWidth ) {
		which = cssExpand[ i ];
		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
	}

	if ( includeWidth ) {
		attrs.opacity = attrs.width = type;
	}

	return attrs;
}

function createTween( value, prop, animation ) {
	var tween,
		collection = ( tweeners[ prop ] || [] ).concat( tweeners[ "*" ] ),
		index = 0,
		length = collection.length;
	for ( ; index < length; index++ ) {
		if ( (tween = collection[ index ].call( animation, prop, value )) ) {

			// We're done with this property
			return tween;
		}
	}
}

function defaultPrefilter( elem, props, opts ) {
	/* jshint validthis: true */
	var prop, value, toggle, tween, hooks, oldfire, display, checkDisplay,
		anim = this,
		orig = {},
		style = elem.style,
		hidden = elem.nodeType && isHidden( elem ),
		dataShow = data_priv.get( elem, "fxshow" );

	// Handle queue: false promises
	if ( !opts.queue ) {
		hooks = jQuery._queueHooks( elem, "fx" );
		if ( hooks.unqueued == null ) {
			hooks.unqueued = 0;
			oldfire = hooks.empty.fire;
			hooks.empty.fire = function() {
				if ( !hooks.unqueued ) {
					oldfire();
				}
			};
		}
		hooks.unqueued++;

		anim.always(function() {
			// Ensure the complete handler is called before this completes
			anim.always(function() {
				hooks.unqueued--;
				if ( !jQuery.queue( elem, "fx" ).length ) {
					hooks.empty.fire();
				}
			});
		});
	}

	// Height/width overflow pass
	if ( elem.nodeType === 1 && ( "height" in props || "width" in props ) ) {
		// Make sure that nothing sneaks out
		// Record all 3 overflow attributes because IE9-10 do not
		// change the overflow attribute when overflowX and
		// overflowY are set to the same value
		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];

		// Set display property to inline-block for height/width
		// animations on inline elements that are having width/height animated
		display = jQuery.css( elem, "display" );

		// Test default display if display is currently "none"
		checkDisplay = display === "none" ?
			data_priv.get( elem, "olddisplay" ) || defaultDisplay( elem.nodeName ) : display;

		if ( checkDisplay === "inline" && jQuery.css( elem, "float" ) === "none" ) {
			style.display = "inline-block";
		}
	}

	if ( opts.overflow ) {
		style.overflow = "hidden";
		anim.always(function() {
			style.overflow = opts.overflow[ 0 ];
			style.overflowX = opts.overflow[ 1 ];
			style.overflowY = opts.overflow[ 2 ];
		});
	}

	// show/hide pass
	for ( prop in props ) {
		value = props[ prop ];
		if ( rfxtypes.exec( value ) ) {
			delete props[ prop ];
			toggle = toggle || value === "toggle";
			if ( value === ( hidden ? "hide" : "show" ) ) {

				// If there is dataShow left over from a stopped hide or show and we are going to proceed with show, we should pretend to be hidden
				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
					hidden = true;
				} else {
					continue;
				}
			}
			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );

		// Any non-fx value stops us from restoring the original display value
		} else {
			display = undefined;
		}
	}

	if ( !jQuery.isEmptyObject( orig ) ) {
		if ( dataShow ) {
			if ( "hidden" in dataShow ) {
				hidden = dataShow.hidden;
			}
		} else {
			dataShow = data_priv.access( elem, "fxshow", {} );
		}

		// Store state if its toggle - enables .stop().toggle() to "reverse"
		if ( toggle ) {
			dataShow.hidden = !hidden;
		}
		if ( hidden ) {
			jQuery( elem ).show();
		} else {
			anim.done(function() {
				jQuery( elem ).hide();
			});
		}
		anim.done(function() {
			var prop;

			data_priv.remove( elem, "fxshow" );
			for ( prop in orig ) {
				jQuery.style( elem, prop, orig[ prop ] );
			}
		});
		for ( prop in orig ) {
			tween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );

			if ( !( prop in dataShow ) ) {
				dataShow[ prop ] = tween.start;
				if ( hidden ) {
					tween.end = tween.start;
					tween.start = prop === "width" || prop === "height" ? 1 : 0;
				}
			}
		}

	// If this is a noop like .hide().hide(), restore an overwritten display value
	} else if ( (display === "none" ? defaultDisplay( elem.nodeName ) : display) === "inline" ) {
		style.display = display;
	}
}

function propFilter( props, specialEasing ) {
	var index, name, easing, value, hooks;

	// camelCase, specialEasing and expand cssHook pass
	for ( index in props ) {
		name = jQuery.camelCase( index );
		easing = specialEasing[ name ];
		value = props[ index ];
		if ( jQuery.isArray( value ) ) {
			easing = value[ 1 ];
			value = props[ index ] = value[ 0 ];
		}

		if ( index !== name ) {
			props[ name ] = value;
			delete props[ index ];
		}

		hooks = jQuery.cssHooks[ name ];
		if ( hooks && "expand" in hooks ) {
			value = hooks.expand( value );
			delete props[ name ];

			// Not quite $.extend, this won't overwrite existing keys.
			// Reusing 'index' because we have the correct "name"
			for ( index in value ) {
				if ( !( index in props ) ) {
					props[ index ] = value[ index ];
					specialEasing[ index ] = easing;
				}
			}
		} else {
			specialEasing[ name ] = easing;
		}
	}
}

function Animation( elem, properties, options ) {
	var result,
		stopped,
		index = 0,
		length = animationPrefilters.length,
		deferred = jQuery.Deferred().always( function() {
			// Don't match elem in the :animated selector
			delete tick.elem;
		}),
		tick = function() {
			if ( stopped ) {
				return false;
			}
			var currentTime = fxNow || createFxNow(),
				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
				// Support: Android 2.3
				// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)
				temp = remaining / animation.duration || 0,
				percent = 1 - temp,
				index = 0,
				length = animation.tweens.length;

			for ( ; index < length ; index++ ) {
				animation.tweens[ index ].run( percent );
			}

			deferred.notifyWith( elem, [ animation, percent, remaining ]);

			if ( percent < 1 && length ) {
				return remaining;
			} else {
				deferred.resolveWith( elem, [ animation ] );
				return false;
			}
		},
		animation = deferred.promise({
			elem: elem,
			props: jQuery.extend( {}, properties ),
			opts: jQuery.extend( true, { specialEasing: {} }, options ),
			originalProperties: properties,
			originalOptions: options,
			startTime: fxNow || createFxNow(),
			duration: options.duration,
			tweens: [],
			createTween: function( prop, end ) {
				var tween = jQuery.Tween( elem, animation.opts, prop, end,
						animation.opts.specialEasing[ prop ] || animation.opts.easing );
				animation.tweens.push( tween );
				return tween;
			},
			stop: function( gotoEnd ) {
				var index = 0,
					// If we are going to the end, we want to run all the tweens
					// otherwise we skip this part
					length = gotoEnd ? animation.tweens.length : 0;
				if ( stopped ) {
					return this;
				}
				stopped = true;
				for ( ; index < length ; index++ ) {
					animation.tweens[ index ].run( 1 );
				}

				// Resolve when we played the last frame; otherwise, reject
				if ( gotoEnd ) {
					deferred.resolveWith( elem, [ animation, gotoEnd ] );
				} else {
					deferred.rejectWith( elem, [ animation, gotoEnd ] );
				}
				return this;
			}
		}),
		props = animation.props;

	propFilter( props, animation.opts.specialEasing );

	for ( ; index < length ; index++ ) {
		result = animationPrefilters[ index ].call( animation, elem, props, animation.opts );
		if ( result ) {
			return result;
		}
	}

	jQuery.map( props, createTween, animation );

	if ( jQuery.isFunction( animation.opts.start ) ) {
		animation.opts.start.call( elem, animation );
	}

	jQuery.fx.timer(
		jQuery.extend( tick, {
			elem: elem,
			anim: animation,
			queue: animation.opts.queue
		})
	);

	// attach callbacks from options
	return animation.progress( animation.opts.progress )
		.done( animation.opts.done, animation.opts.complete )
		.fail( animation.opts.fail )
		.always( animation.opts.always );
}

jQuery.Animation = jQuery.extend( Animation, {

	tweener: function( props, callback ) {
		if ( jQuery.isFunction( props ) ) {
			callback = props;
			props = [ "*" ];
		} else {
			props = props.split(" ");
		}

		var prop,
			index = 0,
			length = props.length;

		for ( ; index < length ; index++ ) {
			prop = props[ index ];
			tweeners[ prop ] = tweeners[ prop ] || [];
			tweeners[ prop ].unshift( callback );
		}
	},

	prefilter: function( callback, prepend ) {
		if ( prepend ) {
			animationPrefilters.unshift( callback );
		} else {
			animationPrefilters.push( callback );
		}
	}
});

jQuery.speed = function( speed, easing, fn ) {
	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
		complete: fn || !fn && easing ||
			jQuery.isFunction( speed ) && speed,
		duration: speed,
		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
	};

	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
		opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;

	// Normalize opt.queue - true/undefined/null -> "fx"
	if ( opt.queue == null || opt.queue === true ) {
		opt.queue = "fx";
	}

	// Queueing
	opt.old = opt.complete;

	opt.complete = function() {
		if ( jQuery.isFunction( opt.old ) ) {
			opt.old.call( this );
		}

		if ( opt.queue ) {
			jQuery.dequeue( this, opt.queue );
		}
	};

	return opt;
};

jQuery.fn.extend({
	fadeTo: function( speed, to, easing, callback ) {

		// Show any hidden elements after setting opacity to 0
		return this.filter( isHidden ).css( "opacity", 0 ).show()

			// Animate to the value specified
			.end().animate({ opacity: to }, speed, easing, callback );
	},
	animate: function( prop, speed, easing, callback ) {
		var empty = jQuery.isEmptyObject( prop ),
			optall = jQuery.speed( speed, easing, callback ),
			doAnimation = function() {
				// Operate on a copy of prop so per-property easing won't be lost
				var anim = Animation( this, jQuery.extend( {}, prop ), optall );

				// Empty animations, or finishing resolves immediately
				if ( empty || data_priv.get( this, "finish" ) ) {
					anim.stop( true );
				}
			};
			doAnimation.finish = doAnimation;

		return empty || optall.queue === false ?
			this.each( doAnimation ) :
			this.queue( optall.queue, doAnimation );
	},
	stop: function( type, clearQueue, gotoEnd ) {
		var stopQueue = function( hooks ) {
			var stop = hooks.stop;
			delete hooks.stop;
			stop( gotoEnd );
		};

		if ( typeof type !== "string" ) {
			gotoEnd = clearQueue;
			clearQueue = type;
			type = undefined;
		}
		if ( clearQueue && type !== false ) {
			this.queue( type || "fx", [] );
		}

		return this.each(function() {
			var dequeue = true,
				index = type != null && type + "queueHooks",
				timers = jQuery.timers,
				data = data_priv.get( this );

			if ( index ) {
				if ( data[ index ] && data[ index ].stop ) {
					stopQueue( data[ index ] );
				}
			} else {
				for ( index in data ) {
					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
						stopQueue( data[ index ] );
					}
				}
			}

			for ( index = timers.length; index--; ) {
				if ( timers[ index ].elem === this && (type == null || timers[ index ].queue === type) ) {
					timers[ index ].anim.stop( gotoEnd );
					dequeue = false;
					timers.splice( index, 1 );
				}
			}

			// Start the next in the queue if the last step wasn't forced.
			// Timers currently will call their complete callbacks, which
			// will dequeue but only if they were gotoEnd.
			if ( dequeue || !gotoEnd ) {
				jQuery.dequeue( this, type );
			}
		});
	},
	finish: function( type ) {
		if ( type !== false ) {
			type = type || "fx";
		}
		return this.each(function() {
			var index,
				data = data_priv.get( this ),
				queue = data[ type + "queue" ],
				hooks = data[ type + "queueHooks" ],
				timers = jQuery.timers,
				length = queue ? queue.length : 0;

			// Enable finishing flag on private data
			data.finish = true;

			// Empty the queue first
			jQuery.queue( this, type, [] );

			if ( hooks && hooks.stop ) {
				hooks.stop.call( this, true );
			}

			// Look for any active animations, and finish them
			for ( index = timers.length; index--; ) {
				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
					timers[ index ].anim.stop( true );
					timers.splice( index, 1 );
				}
			}

			// Look for any animations in the old queue and finish them
			for ( index = 0; index < length; index++ ) {
				if ( queue[ index ] && queue[ index ].finish ) {
					queue[ index ].finish.call( this );
				}
			}

			// Turn off finishing flag
			delete data.finish;
		});
	}
});

jQuery.each([ "toggle", "show", "hide" ], function( i, name ) {
	var cssFn = jQuery.fn[ name ];
	jQuery.fn[ name ] = function( speed, easing, callback ) {
		return speed == null || typeof speed === "boolean" ?
			cssFn.apply( this, arguments ) :
			this.animate( genFx( name, true ), speed, easing, callback );
	};
});

// Generate shortcuts for custom animations
jQuery.each({
	slideDown: genFx("show"),
	slideUp: genFx("hide"),
	slideToggle: genFx("toggle"),
	fadeIn: { opacity: "show" },
	fadeOut: { opacity: "hide" },
	fadeToggle: { opacity: "toggle" }
}, function( name, props ) {
	jQuery.fn[ name ] = function( speed, easing, callback ) {
		return this.animate( props, speed, easing, callback );
	};
});

jQuery.timers = [];
jQuery.fx.tick = function() {
	var timer,
		i = 0,
		timers = jQuery.timers;

	fxNow = jQuery.now();

	for ( ; i < timers.length; i++ ) {
		timer = timers[ i ];
		// Checks the timer has not already been removed
		if ( !timer() && timers[ i ] === timer ) {
			timers.splice( i--, 1 );
		}
	}

	if ( !timers.length ) {
		jQuery.fx.stop();
	}
	fxNow = undefined;
};

jQuery.fx.timer = function( timer ) {
	jQuery.timers.push( timer );
	if ( timer() ) {
		jQuery.fx.start();
	} else {
		jQuery.timers.pop();
	}
};

jQuery.fx.interval = 13;

jQuery.fx.start = function() {
	if ( !timerId ) {
		timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
	}
};

jQuery.fx.stop = function() {
	clearInterval( timerId );
	timerId = null;
};

jQuery.fx.speeds = {
	slow: 600,
	fast: 200,
	// Default speed
	_default: 400
};


// Based off of the plugin by Clint Helfers, with permission.
// http://blindsignals.com/index.php/2009/07/jquery-delay/
jQuery.fn.delay = function( time, type ) {
	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
	type = type || "fx";

	return this.queue( type, function( next, hooks ) {
		var timeout = setTimeout( next, time );
		hooks.stop = function() {
			clearTimeout( timeout );
		};
	});
};


(function() {
	var input = document.createElement( "input" ),
		select = document.createElement( "select" ),
		opt = select.appendChild( document.createElement( "option" ) );

	input.type = "checkbox";

	// Support: iOS<=5.1, Android<=4.2+
	// Default value for a checkbox should be "on"
	support.checkOn = input.value !== "";

	// Support: IE<=11+
	// Must access selectedIndex to make default options select
	support.optSelected = opt.selected;

	// Support: Android<=2.3
	// Options inside disabled selects are incorrectly marked as disabled
	select.disabled = true;
	support.optDisabled = !opt.disabled;

	// Support: IE<=11+
	// An input loses its value after becoming a radio
	input = document.createElement( "input" );
	input.value = "t";
	input.type = "radio";
	support.radioValue = input.value === "t";
})();


var nodeHook, boolHook,
	attrHandle = jQuery.expr.attrHandle;

jQuery.fn.extend({
	attr: function( name, value ) {
		return access( this, jQuery.attr, name, value, arguments.length > 1 );
	},

	removeAttr: function( name ) {
		return this.each(function() {
			jQuery.removeAttr( this, name );
		});
	}
});

jQuery.extend({
	attr: function( elem, name, value ) {
		var hooks, ret,
			nType = elem.nodeType;

		// don't get/set attributes on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		// Fallback to prop when attributes are not supported
		if ( typeof elem.getAttribute === strundefined ) {
			return jQuery.prop( elem, name, value );
		}

		// All attributes are lowercase
		// Grab necessary hook if one is defined
		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
			name = name.toLowerCase();
			hooks = jQuery.attrHooks[ name ] ||
				( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
		}

		if ( value !== undefined ) {

			if ( value === null ) {
				jQuery.removeAttr( elem, name );

			} else if ( hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ) {
				return ret;

			} else {
				elem.setAttribute( name, value + "" );
				return value;
			}

		} else if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
			return ret;

		} else {
			ret = jQuery.find.attr( elem, name );

			// Non-existent attributes return null, we normalize to undefined
			return ret == null ?
				undefined :
				ret;
		}
	},

	removeAttr: function( elem, value ) {
		var name, propName,
			i = 0,
			attrNames = value && value.match( rnotwhite );

		if ( attrNames && elem.nodeType === 1 ) {
			while ( (name = attrNames[i++]) ) {
				propName = jQuery.propFix[ name ] || name;

				// Boolean attributes get special treatment (#10870)
				if ( jQuery.expr.match.bool.test( name ) ) {
					// Set corresponding property to false
					elem[ propName ] = false;
				}

				elem.removeAttribute( name );
			}
		}
	},

	attrHooks: {
		type: {
			set: function( elem, value ) {
				if ( !support.radioValue && value === "radio" &&
					jQuery.nodeName( elem, "input" ) ) {
					var val = elem.value;
					elem.setAttribute( "type", value );
					if ( val ) {
						elem.value = val;
					}
					return value;
				}
			}
		}
	}
});

// Hooks for boolean attributes
boolHook = {
	set: function( elem, value, name ) {
		if ( value === false ) {
			// Remove boolean attributes when set to false
			jQuery.removeAttr( elem, name );
		} else {
			elem.setAttribute( name, name );
		}
		return name;
	}
};
jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
	var getter = attrHandle[ name ] || jQuery.find.attr;

	attrHandle[ name ] = function( elem, name, isXML ) {
		var ret, handle;
		if ( !isXML ) {
			// Avoid an infinite loop by temporarily removing this function from the getter
			handle = attrHandle[ name ];
			attrHandle[ name ] = ret;
			ret = getter( elem, name, isXML ) != null ?
				name.toLowerCase() :
				null;
			attrHandle[ name ] = handle;
		}
		return ret;
	};
});




var rfocusable = /^(?:input|select|textarea|button)$/i;

jQuery.fn.extend({
	prop: function( name, value ) {
		return access( this, jQuery.prop, name, value, arguments.length > 1 );
	},

	removeProp: function( name ) {
		return this.each(function() {
			delete this[ jQuery.propFix[ name ] || name ];
		});
	}
});

jQuery.extend({
	propFix: {
		"for": "htmlFor",
		"class": "className"
	},

	prop: function( elem, name, value ) {
		var ret, hooks, notxml,
			nType = elem.nodeType;

		// Don't get/set properties on text, comment and attribute nodes
		if ( !elem || nType === 3 || nType === 8 || nType === 2 ) {
			return;
		}

		notxml = nType !== 1 || !jQuery.isXMLDoc( elem );

		if ( notxml ) {
			// Fix name and attach hooks
			name = jQuery.propFix[ name ] || name;
			hooks = jQuery.propHooks[ name ];
		}

		if ( value !== undefined ) {
			return hooks && "set" in hooks && (ret = hooks.set( elem, value, name )) !== undefined ?
				ret :
				( elem[ name ] = value );

		} else {
			return hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ?
				ret :
				elem[ name ];
		}
	},

	propHooks: {
		tabIndex: {
			get: function( elem ) {
				return elem.hasAttribute( "tabindex" ) || rfocusable.test( elem.nodeName ) || elem.href ?
					elem.tabIndex :
					-1;
			}
		}
	}
});

if ( !support.optSelected ) {
	jQuery.propHooks.selected = {
		get: function( elem ) {
			var parent = elem.parentNode;
			if ( parent && parent.parentNode ) {
				parent.parentNode.selectedIndex;
			}
			return null;
		}
	};
}

jQuery.each([
	"tabIndex",
	"readOnly",
	"maxLength",
	"cellSpacing",
	"cellPadding",
	"rowSpan",
	"colSpan",
	"useMap",
	"frameBorder",
	"contentEditable"
], function() {
	jQuery.propFix[ this.toLowerCase() ] = this;
});




var rclass = /[\t\r\n\f]/g;

jQuery.fn.extend({
	addClass: function( value ) {
		var classes, elem, cur, clazz, j, finalValue,
			proceed = typeof value === "string" && value,
			i = 0,
			len = this.length;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).addClass( value.call( this, j, this.className ) );
			});
		}

		if ( proceed ) {
			// The disjunction here is for better compressibility (see removeClass)
			classes = ( value || "" ).match( rnotwhite ) || [];

			for ( ; i < len; i++ ) {
				elem = this[ i ];
				cur = elem.nodeType === 1 && ( elem.className ?
					( " " + elem.className + " " ).replace( rclass, " " ) :
					" "
				);

				if ( cur ) {
					j = 0;
					while ( (clazz = classes[j++]) ) {
						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
							cur += clazz + " ";
						}
					}

					// only assign if different to avoid unneeded rendering.
					finalValue = jQuery.trim( cur );
					if ( elem.className !== finalValue ) {
						elem.className = finalValue;
					}
				}
			}
		}

		return this;
	},

	removeClass: function( value ) {
		var classes, elem, cur, clazz, j, finalValue,
			proceed = arguments.length === 0 || typeof value === "string" && value,
			i = 0,
			len = this.length;

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( j ) {
				jQuery( this ).removeClass( value.call( this, j, this.className ) );
			});
		}
		if ( proceed ) {
			classes = ( value || "" ).match( rnotwhite ) || [];

			for ( ; i < len; i++ ) {
				elem = this[ i ];
				// This expression is here for better compressibility (see addClass)
				cur = elem.nodeType === 1 && ( elem.className ?
					( " " + elem.className + " " ).replace( rclass, " " ) :
					""
				);

				if ( cur ) {
					j = 0;
					while ( (clazz = classes[j++]) ) {
						// Remove *all* instances
						while ( cur.indexOf( " " + clazz + " " ) >= 0 ) {
							cur = cur.replace( " " + clazz + " ", " " );
						}
					}

					// Only assign if different to avoid unneeded rendering.
					finalValue = value ? jQuery.trim( cur ) : "";
					if ( elem.className !== finalValue ) {
						elem.className = finalValue;
					}
				}
			}
		}

		return this;
	},

	toggleClass: function( value, stateVal ) {
		var type = typeof value;

		if ( typeof stateVal === "boolean" && type === "string" ) {
			return stateVal ? this.addClass( value ) : this.removeClass( value );
		}

		if ( jQuery.isFunction( value ) ) {
			return this.each(function( i ) {
				jQuery( this ).toggleClass( value.call(this, i, this.className, stateVal), stateVal );
			});
		}

		return this.each(function() {
			if ( type === "string" ) {
				// Toggle individual class names
				var className,
					i = 0,
					self = jQuery( this ),
					classNames = value.match( rnotwhite ) || [];

				while ( (className = classNames[ i++ ]) ) {
					// Check each className given, space separated list
					if ( self.hasClass( className ) ) {
						self.removeClass( className );
					} else {
						self.addClass( className );
					}
				}

			// Toggle whole class name
			} else if ( type === strundefined || type === "boolean" ) {
				if ( this.className ) {
					// store className if set
					data_priv.set( this, "__className__", this.className );
				}

				// If the element has a class name or if we're passed `false`,
				// then remove the whole classname (if there was one, the above saved it).
				// Otherwise bring back whatever was previously saved (if anything),
				// falling back to the empty string if nothing was stored.
				this.className = this.className || value === false ? "" : data_priv.get( this, "__className__" ) || "";
			}
		});
	},

	hasClass: function( selector ) {
		var className = " " + selector + " ",
			i = 0,
			l = this.length;
		for ( ; i < l; i++ ) {
			if ( this[i].nodeType === 1 && (" " + this[i].className + " ").replace(rclass, " ").indexOf( className ) >= 0 ) {
				return true;
			}
		}

		return false;
	}
});




var rreturn = /\r/g;

jQuery.fn.extend({
	val: function( value ) {
		var hooks, ret, isFunction,
			elem = this[0];

		if ( !arguments.length ) {
			if ( elem ) {
				hooks = jQuery.valHooks[ elem.type ] || jQuery.valHooks[ elem.nodeName.toLowerCase() ];

				if ( hooks && "get" in hooks && (ret = hooks.get( elem, "value" )) !== undefined ) {
					return ret;
				}

				ret = elem.value;

				return typeof ret === "string" ?
					// Handle most common string cases
					ret.replace(rreturn, "") :
					// Handle cases where value is null/undef or number
					ret == null ? "" : ret;
			}

			return;
		}

		isFunction = jQuery.isFunction( value );

		return this.each(function( i ) {
			var val;

			if ( this.nodeType !== 1 ) {
				return;
			}

			if ( isFunction ) {
				val = value.call( this, i, jQuery( this ).val() );
			} else {
				val = value;
			}

			// Treat null/undefined as ""; convert numbers to string
			if ( val == null ) {
				val = "";

			} else if ( typeof val === "number" ) {
				val += "";

			} else if ( jQuery.isArray( val ) ) {
				val = jQuery.map( val, function( value ) {
					return value == null ? "" : value + "";
				});
			}

			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];

			// If set returns undefined, fall back to normal setting
			if ( !hooks || !("set" in hooks) || hooks.set( this, val, "value" ) === undefined ) {
				this.value = val;
			}
		});
	}
});

jQuery.extend({
	valHooks: {
		option: {
			get: function( elem ) {
				var val = jQuery.find.attr( elem, "value" );
				return val != null ?
					val :
					// Support: IE10-11+
					// option.text throws exceptions (#14686, #14858)
					jQuery.trim( jQuery.text( elem ) );
			}
		},
		select: {
			get: function( elem ) {
				var value, option,
					options = elem.options,
					index = elem.selectedIndex,
					one = elem.type === "select-one" || index < 0,
					values = one ? null : [],
					max = one ? index + 1 : options.length,
					i = index < 0 ?
						max :
						one ? index : 0;

				// Loop through all the selected options
				for ( ; i < max; i++ ) {
					option = options[ i ];

					// IE6-9 doesn't update selected after form reset (#2551)
					if ( ( option.selected || i === index ) &&
							// Don't return options that are disabled or in a disabled optgroup
							( support.optDisabled ? !option.disabled : option.getAttribute( "disabled" ) === null ) &&
							( !option.parentNode.disabled || !jQuery.nodeName( option.parentNode, "optgroup" ) ) ) {

						// Get the specific value for the option
						value = jQuery( option ).val();

						// We don't need an array for one selects
						if ( one ) {
							return value;
						}

						// Multi-Selects return an array
						values.push( value );
					}
				}

				return values;
			},

			set: function( elem, value ) {
				var optionSet, option,
					options = elem.options,
					values = jQuery.makeArray( value ),
					i = options.length;

				while ( i-- ) {
					option = options[ i ];
					if ( (option.selected = jQuery.inArray( option.value, values ) >= 0) ) {
						optionSet = true;
					}
				}

				// Force browsers to behave consistently when non-matching value is set
				if ( !optionSet ) {
					elem.selectedIndex = -1;
				}
				return values;
			}
		}
	}
});

// Radios and checkboxes getter/setter
jQuery.each([ "radio", "checkbox" ], function() {
	jQuery.valHooks[ this ] = {
		set: function( elem, value ) {
			if ( jQuery.isArray( value ) ) {
				return ( elem.checked = jQuery.inArray( jQuery(elem).val(), value ) >= 0 );
			}
		}
	};
	if ( !support.checkOn ) {
		jQuery.valHooks[ this ].get = function( elem ) {
			return elem.getAttribute("value") === null ? "on" : elem.value;
		};
	}
});




// Return jQuery for attributes-only inclusion


jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
	"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {

	// Handle event binding
	jQuery.fn[ name ] = function( data, fn ) {
		return arguments.length > 0 ?
			this.on( name, null, data, fn ) :
			this.trigger( name );
	};
});

jQuery.fn.extend({
	hover: function( fnOver, fnOut ) {
		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
	},

	bind: function( types, data, fn ) {
		return this.on( types, null, data, fn );
	},
	unbind: function( types, fn ) {
		return this.off( types, null, fn );
	},

	delegate: function( selector, types, data, fn ) {
		return this.on( types, selector, data, fn );
	},
	undelegate: function( selector, types, fn ) {
		// ( namespace ) or ( selector, types [, fn] )
		return arguments.length === 1 ? this.off( selector, "**" ) : this.off( types, selector || "**", fn );
	}
});


var nonce = jQuery.now();

var rquery = (/\?/);



// Support: Android 2.3
// Workaround failure to string-cast null input
jQuery.parseJSON = function( data ) {
	return JSON.parse( data + "" );
};


// Cross-browser xml parsing
jQuery.parseXML = function( data ) {
	var xml, tmp;
	if ( !data || typeof data !== "string" ) {
		return null;
	}

	// Support: IE9
	try {
		tmp = new DOMParser();
		xml = tmp.parseFromString( data, "text/xml" );
	} catch ( e ) {
		xml = undefined;
	}

	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
		jQuery.error( "Invalid XML: " + data );
	}
	return xml;
};


var
	rhash = /#.*$/,
	rts = /([?&])_=[^&]*/,
	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
	// #7653, #8125, #8152: local protocol detection
	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
	rnoContent = /^(?:GET|HEAD)$/,
	rprotocol = /^\/\//,
	rurl = /^([\w.+-]+:)(?:\/\/(?:[^\/?#]*@|)([^\/?#:]*)(?::(\d+)|)|)/,

	/* Prefilters
	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
	 * 2) These are called:
	 *    - BEFORE asking for a transport
	 *    - AFTER param serialization (s.data is a string if s.processData is true)
	 * 3) key is the dataType
	 * 4) the catchall symbol "*" can be used
	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
	 */
	prefilters = {},

	/* Transports bindings
	 * 1) key is the dataType
	 * 2) the catchall symbol "*" can be used
	 * 3) selection will start with transport dataType and THEN go to "*" if needed
	 */
	transports = {},

	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
	allTypes = "*/".concat( "*" ),

	// Document location
	ajaxLocation = window.location.href,

	// Segment location into parts
	ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];

// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
function addToPrefiltersOrTransports( structure ) {

	// dataTypeExpression is optional and defaults to "*"
	return function( dataTypeExpression, func ) {

		if ( typeof dataTypeExpression !== "string" ) {
			func = dataTypeExpression;
			dataTypeExpression = "*";
		}

		var dataType,
			i = 0,
			dataTypes = dataTypeExpression.toLowerCase().match( rnotwhite ) || [];

		if ( jQuery.isFunction( func ) ) {
			// For each dataType in the dataTypeExpression
			while ( (dataType = dataTypes[i++]) ) {
				// Prepend if requested
				if ( dataType[0] === "+" ) {
					dataType = dataType.slice( 1 ) || "*";
					(structure[ dataType ] = structure[ dataType ] || []).unshift( func );

				// Otherwise append
				} else {
					(structure[ dataType ] = structure[ dataType ] || []).push( func );
				}
			}
		}
	};
}

// Base inspection function for prefilters and transports
function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {

	var inspected = {},
		seekingTransport = ( structure === transports );

	function inspect( dataType ) {
		var selected;
		inspected[ dataType ] = true;
		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
			if ( typeof dataTypeOrTransport === "string" && !seekingTransport && !inspected[ dataTypeOrTransport ] ) {
				options.dataTypes.unshift( dataTypeOrTransport );
				inspect( dataTypeOrTransport );
				return false;
			} else if ( seekingTransport ) {
				return !( selected = dataTypeOrTransport );
			}
		});
		return selected;
	}

	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
}

// A special extend for ajax options
// that takes "flat" options (not to be deep extended)
// Fixes #9887
function ajaxExtend( target, src ) {
	var key, deep,
		flatOptions = jQuery.ajaxSettings.flatOptions || {};

	for ( key in src ) {
		if ( src[ key ] !== undefined ) {
			( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
		}
	}
	if ( deep ) {
		jQuery.extend( true, target, deep );
	}

	return target;
}

/* Handles responses to an ajax request:
 * - finds the right dataType (mediates between content-type and expected dataType)
 * - returns the corresponding response
 */
function ajaxHandleResponses( s, jqXHR, responses ) {

	var ct, type, finalDataType, firstDataType,
		contents = s.contents,
		dataTypes = s.dataTypes;

	// Remove auto dataType and get content-type in the process
	while ( dataTypes[ 0 ] === "*" ) {
		dataTypes.shift();
		if ( ct === undefined ) {
			ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
		}
	}

	// Check if we're dealing with a known content-type
	if ( ct ) {
		for ( type in contents ) {
			if ( contents[ type ] && contents[ type ].test( ct ) ) {
				dataTypes.unshift( type );
				break;
			}
		}
	}

	// Check to see if we have a response for the expected dataType
	if ( dataTypes[ 0 ] in responses ) {
		finalDataType = dataTypes[ 0 ];
	} else {
		// Try convertible dataTypes
		for ( type in responses ) {
			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
				finalDataType = type;
				break;
			}
			if ( !firstDataType ) {
				firstDataType = type;
			}
		}
		// Or just use first one
		finalDataType = finalDataType || firstDataType;
	}

	// If we found a dataType
	// We add the dataType to the list if needed
	// and return the corresponding response
	if ( finalDataType ) {
		if ( finalDataType !== dataTypes[ 0 ] ) {
			dataTypes.unshift( finalDataType );
		}
		return responses[ finalDataType ];
	}
}

/* Chain conversions given the request and the original response
 * Also sets the responseXXX fields on the jqXHR instance
 */
function ajaxConvert( s, response, jqXHR, isSuccess ) {
	var conv2, current, conv, tmp, prev,
		converters = {},
		// Work with a copy of dataTypes in case we need to modify it for conversion
		dataTypes = s.dataTypes.slice();

	// Create converters map with lowercased keys
	if ( dataTypes[ 1 ] ) {
		for ( conv in s.converters ) {
			converters[ conv.toLowerCase() ] = s.converters[ conv ];
		}
	}

	current = dataTypes.shift();

	// Convert to each sequential dataType
	while ( current ) {

		if ( s.responseFields[ current ] ) {
			jqXHR[ s.responseFields[ current ] ] = response;
		}

		// Apply the dataFilter if provided
		if ( !prev && isSuccess && s.dataFilter ) {
			response = s.dataFilter( response, s.dataType );
		}

		prev = current;
		current = dataTypes.shift();

		if ( current ) {

		// There's only work to do if current dataType is non-auto
			if ( current === "*" ) {

				current = prev;

			// Convert response if prev dataType is non-auto and differs from current
			} else if ( prev !== "*" && prev !== current ) {

				// Seek a direct converter
				conv = converters[ prev + " " + current ] || converters[ "* " + current ];

				// If none found, seek a pair
				if ( !conv ) {
					for ( conv2 in converters ) {

						// If conv2 outputs current
						tmp = conv2.split( " " );
						if ( tmp[ 1 ] === current ) {

							// If prev can be converted to accepted input
							conv = converters[ prev + " " + tmp[ 0 ] ] ||
								converters[ "* " + tmp[ 0 ] ];
							if ( conv ) {
								// Condense equivalence converters
								if ( conv === true ) {
									conv = converters[ conv2 ];

								// Otherwise, insert the intermediate dataType
								} else if ( converters[ conv2 ] !== true ) {
									current = tmp[ 0 ];
									dataTypes.unshift( tmp[ 1 ] );
								}
								break;
							}
						}
					}
				}

				// Apply converter (if not an equivalence)
				if ( conv !== true ) {

					// Unless errors are allowed to bubble, catch and return them
					if ( conv && s[ "throws" ] ) {
						response = conv( response );
					} else {
						try {
							response = conv( response );
						} catch ( e ) {
							return { state: "parsererror", error: conv ? e : "No conversion from " + prev + " to " + current };
						}
					}
				}
			}
		}
	}

	return { state: "success", data: response };
}

jQuery.extend({

	// Counter for holding the number of active queries
	active: 0,

	// Last-Modified header cache for next request
	lastModified: {},
	etag: {},

	ajaxSettings: {
		url: ajaxLocation,
		type: "GET",
		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
		global: true,
		processData: true,
		async: true,
		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
		/*
		timeout: 0,
		data: null,
		dataType: null,
		username: null,
		password: null,
		cache: null,
		throws: false,
		traditional: false,
		headers: {},
		*/

		accepts: {
			"*": allTypes,
			text: "text/plain",
			html: "text/html",
			xml: "application/xml, text/xml",
			json: "application/json, text/javascript"
		},

		contents: {
			xml: /xml/,
			html: /html/,
			json: /json/
		},

		responseFields: {
			xml: "responseXML",
			text: "responseText",
			json: "responseJSON"
		},

		// Data converters
		// Keys separate source (or catchall "*") and destination types with a single space
		converters: {

			// Convert anything to text
			"* text": String,

			// Text to html (true = no transformation)
			"text html": true,

			// Evaluate text as a json expression
			"text json": jQuery.parseJSON,

			// Parse text as xml
			"text xml": jQuery.parseXML
		},

		// For options that shouldn't be deep extended:
		// you can add your own custom options here if
		// and when you create one that shouldn't be
		// deep extended (see ajaxExtend)
		flatOptions: {
			url: true,
			context: true
		}
	},

	// Creates a full fledged settings object into target
	// with both ajaxSettings and settings fields.
	// If target is omitted, writes into ajaxSettings.
	ajaxSetup: function( target, settings ) {
		return settings ?

			// Building a settings object
			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :

			// Extending ajaxSettings
			ajaxExtend( jQuery.ajaxSettings, target );
	},

	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
	ajaxTransport: addToPrefiltersOrTransports( transports ),

	// Main method
	ajax: function( url, options ) {

		// If url is an object, simulate pre-1.5 signature
		if ( typeof url === "object" ) {
			options = url;
			url = undefined;
		}

		// Force options to be an object
		options = options || {};

		var transport,
			// URL without anti-cache param
			cacheURL,
			// Response headers
			responseHeadersString,
			responseHeaders,
			// timeout handle
			timeoutTimer,
			// Cross-domain detection vars
			parts,
			// To know if global events are to be dispatched
			fireGlobals,
			// Loop variable
			i,
			// Create the final options object
			s = jQuery.ajaxSetup( {}, options ),
			// Callbacks context
			callbackContext = s.context || s,
			// Context for global events is callbackContext if it is a DOM node or jQuery collection
			globalEventContext = s.context && ( callbackContext.nodeType || callbackContext.jquery ) ?
				jQuery( callbackContext ) :
				jQuery.event,
			// Deferreds
			deferred = jQuery.Deferred(),
			completeDeferred = jQuery.Callbacks("once memory"),
			// Status-dependent callbacks
			statusCode = s.statusCode || {},
			// Headers (they are sent all at once)
			requestHeaders = {},
			requestHeadersNames = {},
			// The jqXHR state
			state = 0,
			// Default abort message
			strAbort = "canceled",
			// Fake xhr
			jqXHR = {
				readyState: 0,

				// Builds headers hashtable if needed
				getResponseHeader: function( key ) {
					var match;
					if ( state === 2 ) {
						if ( !responseHeaders ) {
							responseHeaders = {};
							while ( (match = rheaders.exec( responseHeadersString )) ) {
								responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
							}
						}
						match = responseHeaders[ key.toLowerCase() ];
					}
					return match == null ? null : match;
				},

				// Raw string
				getAllResponseHeaders: function() {
					return state === 2 ? responseHeadersString : null;
				},

				// Caches the header
				setRequestHeader: function( name, value ) {
					var lname = name.toLowerCase();
					if ( !state ) {
						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
						requestHeaders[ name ] = value;
					}
					return this;
				},

				// Overrides response content-type header
				overrideMimeType: function( type ) {
					if ( !state ) {
						s.mimeType = type;
					}
					return this;
				},

				// Status-dependent callbacks
				statusCode: function( map ) {
					var code;
					if ( map ) {
						if ( state < 2 ) {
							for ( code in map ) {
								// Lazy-add the new callback in a way that preserves old ones
								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
							}
						} else {
							// Execute the appropriate callbacks
							jqXHR.always( map[ jqXHR.status ] );
						}
					}
					return this;
				},

				// Cancel the request
				abort: function( statusText ) {
					var finalText = statusText || strAbort;
					if ( transport ) {
						transport.abort( finalText );
					}
					done( 0, finalText );
					return this;
				}
			};

		// Attach deferreds
		deferred.promise( jqXHR ).complete = completeDeferred.add;
		jqXHR.success = jqXHR.done;
		jqXHR.error = jqXHR.fail;

		// Remove hash character (#7531: and string promotion)
		// Add protocol if not provided (prefilters might expect it)
		// Handle falsy url in the settings object (#10093: consistency with old signature)
		// We also use the url parameter if available
		s.url = ( ( url || s.url || ajaxLocation ) + "" ).replace( rhash, "" )
			.replace( rprotocol, ajaxLocParts[ 1 ] + "//" );

		// Alias method option to type as per ticket #12004
		s.type = options.method || options.type || s.method || s.type;

		// Extract dataTypes list
		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().match( rnotwhite ) || [ "" ];

		// A cross-domain request is in order when we have a protocol:host:port mismatch
		if ( s.crossDomain == null ) {
			parts = rurl.exec( s.url.toLowerCase() );
			s.crossDomain = !!( parts &&
				( parts[ 1 ] !== ajaxLocParts[ 1 ] || parts[ 2 ] !== ajaxLocParts[ 2 ] ||
					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? "80" : "443" ) ) !==
						( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? "80" : "443" ) ) )
			);
		}

		// Convert data if not already a string
		if ( s.data && s.processData && typeof s.data !== "string" ) {
			s.data = jQuery.param( s.data, s.traditional );
		}

		// Apply prefilters
		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );

		// If request was aborted inside a prefilter, stop there
		if ( state === 2 ) {
			return jqXHR;
		}

		// We can fire global events as of now if asked to
		// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
		fireGlobals = jQuery.event && s.global;

		// Watch for a new set of requests
		if ( fireGlobals && jQuery.active++ === 0 ) {
			jQuery.event.trigger("ajaxStart");
		}

		// Uppercase the type
		s.type = s.type.toUpperCase();

		// Determine if request has content
		s.hasContent = !rnoContent.test( s.type );

		// Save the URL in case we're toying with the If-Modified-Since
		// and/or If-None-Match header later on
		cacheURL = s.url;

		// More options handling for requests with no content
		if ( !s.hasContent ) {

			// If data is available, append data to url
			if ( s.data ) {
				cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
				// #9682: remove data so that it's not used in an eventual retry
				delete s.data;
			}

			// Add anti-cache in url if needed
			if ( s.cache === false ) {
				s.url = rts.test( cacheURL ) ?

					// If there is already a '_' parameter, set its value
					cacheURL.replace( rts, "$1_=" + nonce++ ) :

					// Otherwise add one to the end
					cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
			}
		}

		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
		if ( s.ifModified ) {
			if ( jQuery.lastModified[ cacheURL ] ) {
				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
			}
			if ( jQuery.etag[ cacheURL ] ) {
				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
			}
		}

		// Set the correct header, if data is being sent
		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
			jqXHR.setRequestHeader( "Content-Type", s.contentType );
		}

		// Set the Accepts header for the server, depending on the dataType
		jqXHR.setRequestHeader(
			"Accept",
			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
				s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
				s.accepts[ "*" ]
		);

		// Check for headers option
		for ( i in s.headers ) {
			jqXHR.setRequestHeader( i, s.headers[ i ] );
		}

		// Allow custom headers/mimetypes and early abort
		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
			// Abort if not done already and return
			return jqXHR.abort();
		}

		// Aborting is no longer a cancellation
		strAbort = "abort";

		// Install callbacks on deferreds
		for ( i in { success: 1, error: 1, complete: 1 } ) {
			jqXHR[ i ]( s[ i ] );
		}

		// Get transport
		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );

		// If no transport, we auto-abort
		if ( !transport ) {
			done( -1, "No Transport" );
		} else {
			jqXHR.readyState = 1;

			// Send global event
			if ( fireGlobals ) {
				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
			}
			// Timeout
			if ( s.async && s.timeout > 0 ) {
				timeoutTimer = setTimeout(function() {
					jqXHR.abort("timeout");
				}, s.timeout );
			}

			try {
				state = 1;
				transport.send( requestHeaders, done );
			} catch ( e ) {
				// Propagate exception as error if not done
				if ( state < 2 ) {
					done( -1, e );
				// Simply rethrow otherwise
				} else {
					throw e;
				}
			}
		}

		// Callback for when everything is done
		function done( status, nativeStatusText, responses, headers ) {
			var isSuccess, success, error, response, modified,
				statusText = nativeStatusText;

			// Called once
			if ( state === 2 ) {
				return;
			}

			// State is "done" now
			state = 2;

			// Clear timeout if it exists
			if ( timeoutTimer ) {
				clearTimeout( timeoutTimer );
			}

			// Dereference transport for early garbage collection
			// (no matter how long the jqXHR object will be used)
			transport = undefined;

			// Cache response headers
			responseHeadersString = headers || "";

			// Set readyState
			jqXHR.readyState = status > 0 ? 4 : 0;

			// Determine if successful
			isSuccess = status >= 200 && status < 300 || status === 304;

			// Get response data
			if ( responses ) {
				response = ajaxHandleResponses( s, jqXHR, responses );
			}

			// Convert no matter what (that way responseXXX fields are always set)
			response = ajaxConvert( s, response, jqXHR, isSuccess );

			// If successful, handle type chaining
			if ( isSuccess ) {

				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
				if ( s.ifModified ) {
					modified = jqXHR.getResponseHeader("Last-Modified");
					if ( modified ) {
						jQuery.lastModified[ cacheURL ] = modified;
					}
					modified = jqXHR.getResponseHeader("etag");
					if ( modified ) {
						jQuery.etag[ cacheURL ] = modified;
					}
				}

				// if no content
				if ( status === 204 || s.type === "HEAD" ) {
					statusText = "nocontent";

				// if not modified
				} else if ( status === 304 ) {
					statusText = "notmodified";

				// If we have data, let's convert it
				} else {
					statusText = response.state;
					success = response.data;
					error = response.error;
					isSuccess = !error;
				}
			} else {
				// Extract error from statusText and normalize for non-aborts
				error = statusText;
				if ( status || !statusText ) {
					statusText = "error";
					if ( status < 0 ) {
						status = 0;
					}
				}
			}

			// Set data for the fake xhr object
			jqXHR.status = status;
			jqXHR.statusText = ( nativeStatusText || statusText ) + "";

			// Success/Error
			if ( isSuccess ) {
				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
			} else {
				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
			}

			// Status-dependent callbacks
			jqXHR.statusCode( statusCode );
			statusCode = undefined;

			if ( fireGlobals ) {
				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
					[ jqXHR, s, isSuccess ? success : error ] );
			}

			// Complete
			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );

			if ( fireGlobals ) {
				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
				// Handle the global AJAX counter
				if ( !( --jQuery.active ) ) {
					jQuery.event.trigger("ajaxStop");
				}
			}
		}

		return jqXHR;
	},

	getJSON: function( url, data, callback ) {
		return jQuery.get( url, data, callback, "json" );
	},

	getScript: function( url, callback ) {
		return jQuery.get( url, undefined, callback, "script" );
	}
});

jQuery.each( [ "get", "post" ], function( i, method ) {
	jQuery[ method ] = function( url, data, callback, type ) {
		// Shift arguments if data argument was omitted
		if ( jQuery.isFunction( data ) ) {
			type = type || callback;
			callback = data;
			data = undefined;
		}

		return jQuery.ajax({
			url: url,
			type: method,
			dataType: type,
			data: data,
			success: callback
		});
	};
});


jQuery._evalUrl = function( url ) {
	return jQuery.ajax({
		url: url,
		type: "GET",
		dataType: "script",
		async: false,
		global: false,
		"throws": true
	});
};


jQuery.fn.extend({
	wrapAll: function( html ) {
		var wrap;

		if ( jQuery.isFunction( html ) ) {
			return this.each(function( i ) {
				jQuery( this ).wrapAll( html.call(this, i) );
			});
		}

		if ( this[ 0 ] ) {

			// The elements to wrap the target around
			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );

			if ( this[ 0 ].parentNode ) {
				wrap.insertBefore( this[ 0 ] );
			}

			wrap.map(function() {
				var elem = this;

				while ( elem.firstElementChild ) {
					elem = elem.firstElementChild;
				}

				return elem;
			}).append( this );
		}

		return this;
	},

	wrapInner: function( html ) {
		if ( jQuery.isFunction( html ) ) {
			return this.each(function( i ) {
				jQuery( this ).wrapInner( html.call(this, i) );
			});
		}

		return this.each(function() {
			var self = jQuery( this ),
				contents = self.contents();

			if ( contents.length ) {
				contents.wrapAll( html );

			} else {
				self.append( html );
			}
		});
	},

	wrap: function( html ) {
		var isFunction = jQuery.isFunction( html );

		return this.each(function( i ) {
			jQuery( this ).wrapAll( isFunction ? html.call(this, i) : html );
		});
	},

	unwrap: function() {
		return this.parent().each(function() {
			if ( !jQuery.nodeName( this, "body" ) ) {
				jQuery( this ).replaceWith( this.childNodes );
			}
		}).end();
	}
});


jQuery.expr.filters.hidden = function( elem ) {
	// Support: Opera <= 12.12
	// Opera reports offsetWidths and offsetHeights less than zero on some elements
	return elem.offsetWidth <= 0 && elem.offsetHeight <= 0;
};
jQuery.expr.filters.visible = function( elem ) {
	return !jQuery.expr.filters.hidden( elem );
};




var r20 = /%20/g,
	rbracket = /\[\]$/,
	rCRLF = /\r?\n/g,
	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
	rsubmittable = /^(?:input|select|textarea|keygen)/i;

function buildParams( prefix, obj, traditional, add ) {
	var name;

	if ( jQuery.isArray( obj ) ) {
		// Serialize array item.
		jQuery.each( obj, function( i, v ) {
			if ( traditional || rbracket.test( prefix ) ) {
				// Treat each array item as a scalar.
				add( prefix, v );

			} else {
				// Item is non-scalar (array or object), encode its numeric index.
				buildParams( prefix + "[" + ( typeof v === "object" ? i : "" ) + "]", v, traditional, add );
			}
		});

	} else if ( !traditional && jQuery.type( obj ) === "object" ) {
		// Serialize object item.
		for ( name in obj ) {
			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
		}

	} else {
		// Serialize scalar item.
		add( prefix, obj );
	}
}

// Serialize an array of form elements or a set of
// key/values into a query string
jQuery.param = function( a, traditional ) {
	var prefix,
		s = [],
		add = function( key, value ) {
			// If value is a function, invoke it and return its value
			value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );
			s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
		};

	// Set traditional to true for jQuery <= 1.3.2 behavior.
	if ( traditional === undefined ) {
		traditional = jQuery.ajaxSettings && jQuery.ajaxSettings.traditional;
	}

	// If an array was passed in, assume that it is an array of form elements.
	if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
		// Serialize the form elements
		jQuery.each( a, function() {
			add( this.name, this.value );
		});

	} else {
		// If traditional, encode the "old" way (the way 1.3.2 or older
		// did it), otherwise encode params recursively.
		for ( prefix in a ) {
			buildParams( prefix, a[ prefix ], traditional, add );
		}
	}

	// Return the resulting serialization
	return s.join( "&" ).replace( r20, "+" );
};

jQuery.fn.extend({
	serialize: function() {
		return jQuery.param( this.serializeArray() );
	},
	serializeArray: function() {
		return this.map(function() {
			// Can add propHook for "elements" to filter or add form elements
			var elements = jQuery.prop( this, "elements" );
			return elements ? jQuery.makeArray( elements ) : this;
		})
		.filter(function() {
			var type = this.type;

			// Use .is( ":disabled" ) so that fieldset[disabled] works
			return this.name && !jQuery( this ).is( ":disabled" ) &&
				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
				( this.checked || !rcheckableType.test( type ) );
		})
		.map(function( i, elem ) {
			var val = jQuery( this ).val();

			return val == null ?
				null :
				jQuery.isArray( val ) ?
					jQuery.map( val, function( val ) {
						return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
					}) :
					{ name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
		}).get();
	}
});


jQuery.ajaxSettings.xhr = function() {
	try {
		return new XMLHttpRequest();
	} catch( e ) {}
};

var xhrId = 0,
	xhrCallbacks = {},
	xhrSuccessStatus = {
		// file protocol always yields status code 0, assume 200
		0: 200,
		// Support: IE9
		// #1450: sometimes IE returns 1223 when it should be 204
		1223: 204
	},
	xhrSupported = jQuery.ajaxSettings.xhr();

// Support: IE9
// Open requests must be manually aborted on unload (#5280)
// See https://support.microsoft.com/kb/2856746 for more info
if ( window.attachEvent ) {
	window.attachEvent( "onunload", function() {
		for ( var key in xhrCallbacks ) {
			xhrCallbacks[ key ]();
		}
	});
}

support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
support.ajax = xhrSupported = !!xhrSupported;

jQuery.ajaxTransport(function( options ) {
	var callback;

	// Cross domain only allowed if supported through XMLHttpRequest
	if ( support.cors || xhrSupported && !options.crossDomain ) {
		return {
			send: function( headers, complete ) {
				var i,
					xhr = options.xhr(),
					id = ++xhrId;

				xhr.open( options.type, options.url, options.async, options.username, options.password );

				// Apply custom fields if provided
				if ( options.xhrFields ) {
					for ( i in options.xhrFields ) {
						xhr[ i ] = options.xhrFields[ i ];
					}
				}

				// Override mime type if needed
				if ( options.mimeType && xhr.overrideMimeType ) {
					xhr.overrideMimeType( options.mimeType );
				}

				// X-Requested-With header
				// For cross-domain requests, seeing as conditions for a preflight are
				// akin to a jigsaw puzzle, we simply never set it to be sure.
				// (it can always be set on a per-request basis or even using ajaxSetup)
				// For same-domain requests, won't change header if already provided.
				if ( !options.crossDomain && !headers["X-Requested-With"] ) {
					headers["X-Requested-With"] = "XMLHttpRequest";
				}

				// Set headers
				for ( i in headers ) {
					xhr.setRequestHeader( i, headers[ i ] );
				}

				// Callback
				callback = function( type ) {
					return function() {
						if ( callback ) {
							delete xhrCallbacks[ id ];
							callback = xhr.onload = xhr.onerror = null;

							if ( type === "abort" ) {
								xhr.abort();
							} else if ( type === "error" ) {
								complete(
									// file: protocol always yields status 0; see #8605, #14207
									xhr.status,
									xhr.statusText
								);
							} else {
								complete(
									xhrSuccessStatus[ xhr.status ] || xhr.status,
									xhr.statusText,
									// Support: IE9
									// Accessing binary-data responseText throws an exception
									// (#11426)
									typeof xhr.responseText === "string" ? {
										text: xhr.responseText
									} : undefined,
									xhr.getAllResponseHeaders()
								);
							}
						}
					};
				};

				// Listen to events
				xhr.onload = callback();
				xhr.onerror = callback("error");

				// Create the abort callback
				callback = xhrCallbacks[ id ] = callback("abort");

				try {
					// Do send the request (this may raise an exception)
					xhr.send( options.hasContent && options.data || null );
				} catch ( e ) {
					// #14683: Only rethrow if this hasn't been notified as an error yet
					if ( callback ) {
						throw e;
					}
				}
			},

			abort: function() {
				if ( callback ) {
					callback();
				}
			}
		};
	}
});




// Install script dataType
jQuery.ajaxSetup({
	accepts: {
		script: "text/javascript, application/javascript, application/ecmascript, application/x-ecmascript"
	},
	contents: {
		script: /(?:java|ecma)script/
	},
	converters: {
		"text script": function( text ) {
			jQuery.globalEval( text );
			return text;
		}
	}
});

// Handle cache's special case and crossDomain
jQuery.ajaxPrefilter( "script", function( s ) {
	if ( s.cache === undefined ) {
		s.cache = false;
	}
	if ( s.crossDomain ) {
		s.type = "GET";
	}
});

// Bind script tag hack transport
jQuery.ajaxTransport( "script", function( s ) {
	// This transport only deals with cross domain requests
	if ( s.crossDomain ) {
		var script, callback;
		return {
			send: function( _, complete ) {
				script = jQuery("<script>").prop({
					async: true,
					charset: s.scriptCharset,
					src: s.url
				}).on(
					"load error",
					callback = function( evt ) {
						script.remove();
						callback = null;
						if ( evt ) {
							complete( evt.type === "error" ? 404 : 200, evt.type );
						}
					}
				);
				document.head.appendChild( script[ 0 ] );
			},
			abort: function() {
				if ( callback ) {
					callback();
				}
			}
		};
	}
});




var oldCallbacks = [],
	rjsonp = /(=)\?(?=&|$)|\?\?/;

// Default jsonp settings
jQuery.ajaxSetup({
	jsonp: "callback",
	jsonpCallback: function() {
		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
		this[ callback ] = true;
		return callback;
	}
});

// Detect, normalize options and install callbacks for jsonp requests
jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {

	var callbackName, overwritten, responseContainer,
		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
			"url" :
			typeof s.data === "string" && !( s.contentType || "" ).indexOf("application/x-www-form-urlencoded") && rjsonp.test( s.data ) && "data"
		);

	// Handle iff the expected data type is "jsonp" or we have a parameter to set
	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {

		// Get callback name, remembering preexisting value associated with it
		callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
			s.jsonpCallback() :
			s.jsonpCallback;

		// Insert callback into url or form data
		if ( jsonProp ) {
			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
		} else if ( s.jsonp !== false ) {
			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
		}

		// Use data converter to retrieve json after script execution
		s.converters["script json"] = function() {
			if ( !responseContainer ) {
				jQuery.error( callbackName + " was not called" );
			}
			return responseContainer[ 0 ];
		};

		// force json dataType
		s.dataTypes[ 0 ] = "json";

		// Install callback
		overwritten = window[ callbackName ];
		window[ callbackName ] = function() {
			responseContainer = arguments;
		};

		// Clean-up function (fires after converters)
		jqXHR.always(function() {
			// Restore preexisting value
			window[ callbackName ] = overwritten;

			// Save back as free
			if ( s[ callbackName ] ) {
				// make sure that re-using the options doesn't screw things around
				s.jsonpCallback = originalSettings.jsonpCallback;

				// save the callback name for future use
				oldCallbacks.push( callbackName );
			}

			// Call if it was a function and we have a response
			if ( responseContainer && jQuery.isFunction( overwritten ) ) {
				overwritten( responseContainer[ 0 ] );
			}

			responseContainer = overwritten = undefined;
		});

		// Delegate to script
		return "script";
	}
});




// data: string of html
// context (optional): If specified, the fragment will be created in this context, defaults to document
// keepScripts (optional): If true, will include scripts passed in the html string
jQuery.parseHTML = function( data, context, keepScripts ) {
	if ( !data || typeof data !== "string" ) {
		return null;
	}
	if ( typeof context === "boolean" ) {
		keepScripts = context;
		context = false;
	}
	context = context || document;

	var parsed = rsingleTag.exec( data ),
		scripts = !keepScripts && [];

	// Single tag
	if ( parsed ) {
		return [ context.createElement( parsed[1] ) ];
	}

	parsed = jQuery.buildFragment( [ data ], context, scripts );

	if ( scripts && scripts.length ) {
		jQuery( scripts ).remove();
	}

	return jQuery.merge( [], parsed.childNodes );
};


// Keep a copy of the old load method
var _load = jQuery.fn.load;

/**
 * Load a url into a page
 */
jQuery.fn.load = function( url, params, callback ) {
	if ( typeof url !== "string" && _load ) {
		return _load.apply( this, arguments );
	}

	var selector, type, response,
		self = this,
		off = url.indexOf(" ");

	if ( off >= 0 ) {
		selector = jQuery.trim( url.slice( off ) );
		url = url.slice( 0, off );
	}

	// If it's a function
	if ( jQuery.isFunction( params ) ) {

		// We assume that it's the callback
		callback = params;
		params = undefined;

	// Otherwise, build a param string
	} else if ( params && typeof params === "object" ) {
		type = "POST";
	}

	// If we have elements to modify, make the request
	if ( self.length > 0 ) {
		jQuery.ajax({
			url: url,

			// if "type" variable is undefined, then "GET" method will be used
			type: type,
			dataType: "html",
			data: params
		}).done(function( responseText ) {

			// Save response for use in complete callback
			response = arguments;

			self.html( selector ?

				// If a selector was specified, locate the right elements in a dummy div
				// Exclude scripts to avoid IE 'Permission Denied' errors
				jQuery("<div>").append( jQuery.parseHTML( responseText ) ).find( selector ) :

				// Otherwise use the full result
				responseText );

		}).complete( callback && function( jqXHR, status ) {
			self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
		});
	}

	return this;
};




// Attach a bunch of functions for handling common AJAX events
jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSuccess", "ajaxSend" ], function( i, type ) {
	jQuery.fn[ type ] = function( fn ) {
		return this.on( type, fn );
	};
});




jQuery.expr.filters.animated = function( elem ) {
	return jQuery.grep(jQuery.timers, function( fn ) {
		return elem === fn.elem;
	}).length;
};




var docElem = window.document.documentElement;

/**
 * Gets a window from an element
 */
function getWindow( elem ) {
	return jQuery.isWindow( elem ) ? elem : elem.nodeType === 9 && elem.defaultView;
}

jQuery.offset = {
	setOffset: function( elem, options, i ) {
		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
			position = jQuery.css( elem, "position" ),
			curElem = jQuery( elem ),
			props = {};

		// Set position first, in-case top/left are set even on static elem
		if ( position === "static" ) {
			elem.style.position = "relative";
		}

		curOffset = curElem.offset();
		curCSSTop = jQuery.css( elem, "top" );
		curCSSLeft = jQuery.css( elem, "left" );
		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
			( curCSSTop + curCSSLeft ).indexOf("auto") > -1;

		// Need to be able to calculate position if either
		// top or left is auto and position is either absolute or fixed
		if ( calculatePosition ) {
			curPosition = curElem.position();
			curTop = curPosition.top;
			curLeft = curPosition.left;

		} else {
			curTop = parseFloat( curCSSTop ) || 0;
			curLeft = parseFloat( curCSSLeft ) || 0;
		}

		if ( jQuery.isFunction( options ) ) {
			options = options.call( elem, i, curOffset );
		}

		if ( options.top != null ) {
			props.top = ( options.top - curOffset.top ) + curTop;
		}
		if ( options.left != null ) {
			props.left = ( options.left - curOffset.left ) + curLeft;
		}

		if ( "using" in options ) {
			options.using.call( elem, props );

		} else {
			curElem.css( props );
		}
	}
};

jQuery.fn.extend({
	offset: function( options ) {
		if ( arguments.length ) {
			return options === undefined ?
				this :
				this.each(function( i ) {
					jQuery.offset.setOffset( this, options, i );
				});
		}

		var docElem, win,
			elem = this[ 0 ],
			box = { top: 0, left: 0 },
			doc = elem && elem.ownerDocument;

		if ( !doc ) {
			return;
		}

		docElem = doc.documentElement;

		// Make sure it's not a disconnected DOM node
		if ( !jQuery.contains( docElem, elem ) ) {
			return box;
		}

		// Support: BlackBerry 5, iOS 3 (original iPhone)
		// If we don't have gBCR, just use 0,0 rather than error
		if ( typeof elem.getBoundingClientRect !== strundefined ) {
			box = elem.getBoundingClientRect();
		}
		win = getWindow( doc );
		return {
			top: box.top + win.pageYOffset - docElem.clientTop,
			left: box.left + win.pageXOffset - docElem.clientLeft
		};
	},

	position: function() {
		if ( !this[ 0 ] ) {
			return;
		}

		var offsetParent, offset,
			elem = this[ 0 ],
			parentOffset = { top: 0, left: 0 };

		// Fixed elements are offset from window (parentOffset = {top:0, left: 0}, because it is its only offset parent
		if ( jQuery.css( elem, "position" ) === "fixed" ) {
			// Assume getBoundingClientRect is there when computed position is fixed
			offset = elem.getBoundingClientRect();

		} else {
			// Get *real* offsetParent
			offsetParent = this.offsetParent();

			// Get correct offsets
			offset = this.offset();
			if ( !jQuery.nodeName( offsetParent[ 0 ], "html" ) ) {
				parentOffset = offsetParent.offset();
			}

			// Add offsetParent borders
			parentOffset.top += jQuery.css( offsetParent[ 0 ], "borderTopWidth", true );
			parentOffset.left += jQuery.css( offsetParent[ 0 ], "borderLeftWidth", true );
		}

		// Subtract parent offsets and element margins
		return {
			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
		};
	},

	offsetParent: function() {
		return this.map(function() {
			var offsetParent = this.offsetParent || docElem;

			while ( offsetParent && ( !jQuery.nodeName( offsetParent, "html" ) && jQuery.css( offsetParent, "position" ) === "static" ) ) {
				offsetParent = offsetParent.offsetParent;
			}

			return offsetParent || docElem;
		});
	}
});

// Create scrollLeft and scrollTop methods
jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
	var top = "pageYOffset" === prop;

	jQuery.fn[ method ] = function( val ) {
		return access( this, function( elem, method, val ) {
			var win = getWindow( elem );

			if ( val === undefined ) {
				return win ? win[ prop ] : elem[ method ];
			}

			if ( win ) {
				win.scrollTo(
					!top ? val : window.pageXOffset,
					top ? val : window.pageYOffset
				);

			} else {
				elem[ method ] = val;
			}
		}, method, val, arguments.length, null );
	};
});

// Support: Safari<7+, Chrome<37+
// Add the top/left cssHooks using jQuery.fn.position
// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
// Blink bug: https://code.google.com/p/chromium/issues/detail?id=229280
// getComputedStyle returns percent when specified for top/left/bottom/right;
// rather than make the css module depend on the offset module, just check for it here
jQuery.each( [ "top", "left" ], function( i, prop ) {
	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
		function( elem, computed ) {
			if ( computed ) {
				computed = curCSS( elem, prop );
				// If curCSS returns percentage, fallback to offset
				return rnumnonpx.test( computed ) ?
					jQuery( elem ).position()[ prop ] + "px" :
					computed;
			}
		}
	);
});


// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name }, function( defaultExtra, funcName ) {
		// Margin is only for outerHeight, outerWidth
		jQuery.fn[ funcName ] = function( margin, value ) {
			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );

			return access( this, function( elem, type, value ) {
				var doc;

				if ( jQuery.isWindow( elem ) ) {
					// As of 5/8/2012 this will yield incorrect results for Mobile Safari, but there
					// isn't a whole lot we can do. See pull request at this URL for discussion:
					// https://github.com/jquery/jquery/pull/764
					return elem.document.documentElement[ "client" + name ];
				}

				// Get document width or height
				if ( elem.nodeType === 9 ) {
					doc = elem.documentElement;

					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
					// whichever is greatest
					return Math.max(
						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
						elem.body[ "offset" + name ], doc[ "offset" + name ],
						doc[ "client" + name ]
					);
				}

				return value === undefined ?
					// Get width or height on the element, requesting but not forcing parseFloat
					jQuery.css( elem, type, extra ) :

					// Set width or height on the element
					jQuery.style( elem, type, value, extra );
			}, type, chainable ? margin : undefined, chainable, null );
		};
	});
});


// The number of elements contained in the matched element set
jQuery.fn.size = function() {
	return this.length;
};

jQuery.fn.andSelf = jQuery.fn.addBack;




// Register as a named AMD module, since jQuery can be concatenated with other
// files that may use define, but not via a proper concatenation script that
// understands anonymous AMD modules. A named AMD is safest and most robust
// way to register. Lowercase jquery is used because AMD module names are
// derived from file names, and jQuery is normally delivered in a lowercase
// file name. Do this after creating the global so that if an AMD module wants
// to call noConflict to hide this version of jQuery, it will work.

// Note that for maximum portability, libraries that are not jQuery should
// declare themselves as anonymous modules, and avoid setting a global if an
// AMD loader is present. jQuery is a special case. For more information, see
// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon

if ( typeof define === "function" && define.amd ) {
	define( "jquery", [], function() {
		return jQuery;
	});
}




var
	// Map over jQuery in case of overwrite
	_jQuery = window.jQuery,

	// Map over the $ in case of overwrite
	_$ = window.$;

jQuery.noConflict = function( deep ) {
	if ( window.$ === jQuery ) {
		window.$ = _$;
	}

	if ( deep && window.jQuery === jQuery ) {
		window.jQuery = _jQuery;
	}

	return jQuery;
};

// Expose jQuery and $ identifiers, even in AMD
// (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
// and CommonJS for browser emulators (#13566)
if ( typeof noGlobal === strundefined ) {
	window.jQuery = window.$ = jQuery;
}




return jQuery;

}));

/**
 * @license
 * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
 * Build: `lodash modern -o ./dist/lodash.js`
 * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
 * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
 * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 * Available under MIT license <http://lodash.com/license>
 */
;(function() {

  /** Used as a safe reference for `undefined` in pre ES5 environments */
  var undefined;

  /** Used to pool arrays and objects used internally */
  var arrayPool = [],
      objectPool = [];

  /** Used to generate unique IDs */
  var idCounter = 0;

  /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */
  var keyPrefix = +new Date + '';

  /** Used as the size when optimizations are enabled for large arrays */
  var largeArraySize = 75;

  /** Used as the max size of the `arrayPool` and `objectPool` */
  var maxPoolSize = 40;

  /** Used to detect and test whitespace */
  var whitespace = (
    // whitespace
    ' \t\x0B\f\xA0\ufeff' +

    // line terminators
    '\n\r\u2028\u2029' +

    // unicode category "Zs" space separators
    '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
  );

  /** Used to match empty string literals in compiled template source */
  var reEmptyStringLeading = /\b__p \+= '';/g,
      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

  /**
   * Used to match ES6 template delimiters
   * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-literals-string-literals
   */
  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

  /** Used to match regexp flags from their coerced string values */
  var reFlags = /\w*$/;

  /** Used to detected named functions */
  var reFuncName = /^\s*function[ \n\r\t]+\w/;

  /** Used to match "interpolate" template delimiters */
  var reInterpolate = /<%=([\s\S]+?)%>/g;

  /** Used to match leading whitespace and zeros to be removed */
  var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)');

  /** Used to ensure capturing order of template delimiters */
  var reNoMatch = /($^)/;

  /** Used to detect functions containing a `this` reference */
  var reThis = /\bthis\b/;

  /** Used to match unescaped characters in compiled string literals */
  var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;

  /** Used to assign default `context` object properties */
  var contextProps = [
    'Array', 'Boolean', 'Date', 'Function', 'Math', 'Number', 'Object',
    'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
    'parseInt', 'setTimeout'
  ];

  /** Used to make template sourceURLs easier to identify */
  var templateCounter = 0;

  /** `Object#toString` result shortcuts */
  var argsClass = '[object Arguments]',
      arrayClass = '[object Array]',
      boolClass = '[object Boolean]',
      dateClass = '[object Date]',
      funcClass = '[object Function]',
      numberClass = '[object Number]',
      objectClass = '[object Object]',
      regexpClass = '[object RegExp]',
      stringClass = '[object String]';

  /** Used to identify object classifications that `_.clone` supports */
  var cloneableClasses = {};
  cloneableClasses[funcClass] = false;
  cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
  cloneableClasses[boolClass] = cloneableClasses[dateClass] =
  cloneableClasses[numberClass] = cloneableClasses[objectClass] =
  cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;

  /** Used as an internal `_.debounce` options object */
  var debounceOptions = {
    'leading': false,
    'maxWait': 0,
    'trailing': false
  };

  /** Used as the property descriptor for `__bindData__` */
  var descriptor = {
    'configurable': false,
    'enumerable': false,
    'value': null,
    'writable': false
  };

  /** Used to determine if values are of the language type Object */
  var objectTypes = {
    'boolean': false,
    'function': true,
    'object': true,
    'number': false,
    'string': false,
    'undefined': false
  };

  /** Used to escape characters for inclusion in compiled string literals */
  var stringEscapes = {
    '\\': '\\',
    "'": "'",
    '\n': 'n',
    '\r': 'r',
    '\t': 't',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  /** Used as a reference to the global object */
  var root = (objectTypes[typeof window] && window) || this;

  /** Detect free variable `exports` */
  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;

  /** Detect free variable `module` */
  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;

  /** Detect the popular CommonJS extension `module.exports` */
  var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;

  /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
  var freeGlobal = objectTypes[typeof global] && global;
  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
    root = freeGlobal;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * The base implementation of `_.indexOf` without support for binary searches
   * or `fromIndex` constraints.
   *
   * @private
   * @param {Array} array The array to search.
   * @param {*} value The value to search for.
   * @param {number} [fromIndex=0] The index to search from.
   * @returns {number} Returns the index of the matched value or `-1`.
   */
  function baseIndexOf(array, value, fromIndex) {
    var index = (fromIndex || 0) - 1,
        length = array ? array.length : 0;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }

  /**
   * An implementation of `_.contains` for cache objects that mimics the return
   * signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
   *
   * @private
   * @param {Object} cache The cache object to inspect.
   * @param {*} value The value to search for.
   * @returns {number} Returns `0` if `value` is found, else `-1`.
   */
  function cacheIndexOf(cache, value) {
    var type = typeof value;
    cache = cache.cache;

    if (type == 'boolean' || value == null) {
      return cache[value] ? 0 : -1;
    }
    if (type != 'number' && type != 'string') {
      type = 'object';
    }
    var key = type == 'number' ? value : keyPrefix + value;
    cache = (cache = cache[type]) && cache[key];

    return type == 'object'
      ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1)
      : (cache ? 0 : -1);
  }

  /**
   * Adds a given value to the corresponding cache object.
   *
   * @private
   * @param {*} value The value to add to the cache.
   */
  function cachePush(value) {
    var cache = this.cache,
        type = typeof value;

    if (type == 'boolean' || value == null) {
      cache[value] = true;
    } else {
      if (type != 'number' && type != 'string') {
        type = 'object';
      }
      var key = type == 'number' ? value : keyPrefix + value,
          typeCache = cache[type] || (cache[type] = {});

      if (type == 'object') {
        (typeCache[key] || (typeCache[key] = [])).push(value);
      } else {
        typeCache[key] = true;
      }
    }
  }

  /**
   * Used by `_.max` and `_.min` as the default callback when a given
   * collection is a string value.
   *
   * @private
   * @param {string} value The character to inspect.
   * @returns {number} Returns the code unit of given character.
   */
  function charAtCallback(value) {
    return value.charCodeAt(0);
  }

  /**
   * Used by `sortBy` to compare transformed `collection` elements, stable sorting
   * them in ascending order.
   *
   * @private
   * @param {Object} a The object to compare to `b`.
   * @param {Object} b The object to compare to `a`.
   * @returns {number} Returns the sort order indicator of `1` or `-1`.
   */
  function compareAscending(a, b) {
    var ac = a.criteria,
        bc = b.criteria,
        index = -1,
        length = ac.length;

    while (++index < length) {
      var value = ac[index],
          other = bc[index];

      if (value !== other) {
        if (value > other || typeof value == 'undefined') {
          return 1;
        }
        if (value < other || typeof other == 'undefined') {
          return -1;
        }
      }
    }
    // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
    // that causes it, under certain circumstances, to return the same value for
    // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247
    //
    // This also ensures a stable sort in V8 and other engines.
    // See http://code.google.com/p/v8/issues/detail?id=90
    return a.index - b.index;
  }

  /**
   * Creates a cache object to optimize linear searches of large arrays.
   *
   * @private
   * @param {Array} [array=[]] The array to search.
   * @returns {null|Object} Returns the cache object or `null` if caching should not be used.
   */
  function createCache(array) {
    var index = -1,
        length = array.length,
        first = array[0],
        mid = array[(length / 2) | 0],
        last = array[length - 1];

    if (first && typeof first == 'object' &&
        mid && typeof mid == 'object' && last && typeof last == 'object') {
      return false;
    }
    var cache = getObject();
    cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false;

    var result = getObject();
    result.array = array;
    result.cache = cache;
    result.push = cachePush;

    while (++index < length) {
      result.push(array[index]);
    }
    return result;
  }

  /**
   * Used by `template` to escape characters for inclusion in compiled
   * string literals.
   *
   * @private
   * @param {string} match The matched character to escape.
   * @returns {string} Returns the escaped character.
   */
  function escapeStringChar(match) {
    return '\\' + stringEscapes[match];
  }

  /**
   * Gets an array from the array pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Array} The array from the pool.
   */
  function getArray() {
    return arrayPool.pop() || [];
  }

  /**
   * Gets an object from the object pool or creates a new one if the pool is empty.
   *
   * @private
   * @returns {Object} The object from the pool.
   */
  function getObject() {
    return objectPool.pop() || {
      'array': null,
      'cache': null,
      'criteria': null,
      'false': false,
      'index': 0,
      'null': false,
      'number': null,
      'object': null,
      'push': null,
      'string': null,
      'true': false,
      'undefined': false,
      'value': null
    };
  }

  /**
   * Releases the given array back to the array pool.
   *
   * @private
   * @param {Array} [array] The array to release.
   */
  function releaseArray(array) {
    array.length = 0;
    if (arrayPool.length < maxPoolSize) {
      arrayPool.push(array);
    }
  }

  /**
   * Releases the given object back to the object pool.
   *
   * @private
   * @param {Object} [object] The object to release.
   */
  function releaseObject(object) {
    var cache = object.cache;
    if (cache) {
      releaseObject(cache);
    }
    object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null;
    if (objectPool.length < maxPoolSize) {
      objectPool.push(object);
    }
  }

  /**
   * Slices the `collection` from the `start` index up to, but not including,
   * the `end` index.
   *
   * Note: This function is used instead of `Array#slice` to support node lists
   * in IE < 9 and to ensure dense arrays are returned.
   *
   * @private
   * @param {Array|Object|string} collection The collection to slice.
   * @param {number} start The start index.
   * @param {number} end The end index.
   * @returns {Array} Returns the new array.
   */
  function slice(array, start, end) {
    start || (start = 0);
    if (typeof end == 'undefined') {
      end = array ? array.length : 0;
    }
    var index = -1,
        length = end - start || 0,
        result = Array(length < 0 ? 0 : length);

    while (++index < length) {
      result[index] = array[start + index];
    }
    return result;
  }

  /*--------------------------------------------------------------------------*/

  /**
   * Create a new `lodash` function using the given context object.
   *
   * @static
   * @memberOf _
   * @category Utilities
   * @param {Object} [context=root] The context object.
   * @returns {Function} Returns the `lodash` function.
   */
  function runInContext(context) {
    // Avoid issues with some ES3 environments that attempt to use values, named
    // after built-in constructors like `Object`, for the creation of literals.
    // ES5 clears this up by stating that literals must use built-in constructors.
    // See http://es5.github.io/#x11.1.5.
    context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;

    /** Native constructor references */
    var Array = context.Array,
        Boolean = context.Boolean,
        Date = context.Date,
        Function = context.Function,
        Math = context.Math,
        Number = context.Number,
        Object = context.Object,
        RegExp = context.RegExp,
        String = context.String,
        TypeError = context.TypeError;

    /**
     * Used for `Array` method references.
     *
     * Normally `Array.prototype` would suffice, however, using an array literal
     * avoids issues in Narwhal.
     */
    var arrayRef = [];

    /** Used for native method references */
    var objectProto = Object.prototype;

    /** Used to restore the original `_` reference in `noConflict` */
    var oldDash = context._;

    /** Used to resolve the internal [[Class]] of values */
    var toString = objectProto.toString;

    /** Used to detect if a method is native */
    var reNative = RegExp('^' +
      String(toString)
        .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
        .replace(/toString| for [^\]]+/g, '.*?') + '$'
    );

    /** Native method shortcuts */
    var ceil = Math.ceil,
        clearTimeout = context.clearTimeout,
        floor = Math.floor,
        fnToString = Function.prototype.toString,
        getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
        hasOwnProperty = objectProto.hasOwnProperty,
        push = arrayRef.push,
        setTimeout = context.setTimeout,
        splice = arrayRef.splice,
        unshift = arrayRef.unshift;

    /** Used to set meta data on functions */
    var defineProperty = (function() {
      // IE 8 only accepts DOM elements
      try {
        var o = {},
            func = isNative(func = Object.defineProperty) && func,
            result = func(o, o, o) && func;
      } catch(e) { }
      return result;
    }());

    /* Native method shortcuts for methods with the same name as other `lodash` methods */
    var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
        nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
        nativeIsFinite = context.isFinite,
        nativeIsNaN = context.isNaN,
        nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
        nativeMax = Math.max,
        nativeMin = Math.min,
        nativeParseInt = context.parseInt,
        nativeRandom = Math.random;

    /** Used to lookup a built-in constructor by [[Class]] */
    var ctorByClass = {};
    ctorByClass[arrayClass] = Array;
    ctorByClass[boolClass] = Boolean;
    ctorByClass[dateClass] = Date;
    ctorByClass[funcClass] = Function;
    ctorByClass[objectClass] = Object;
    ctorByClass[numberClass] = Number;
    ctorByClass[regexpClass] = RegExp;
    ctorByClass[stringClass] = String;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object which wraps the given value to enable intuitive
     * method chaining.
     *
     * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
     * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
     * and `unshift`
     *
     * Chaining is supported in custom builds as long as the `value` method is
     * implicitly or explicitly included in the build.
     *
     * The chainable wrapper functions are:
     * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
     * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`,
     * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`,
     * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
     * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
     * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
     * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`,
     * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
     * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`,
     * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`,
     * and `zip`
     *
     * The non-chainable wrapper functions are:
     * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`,
     * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`,
     * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
     * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`,
     * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`,
     * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`,
     * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`,
     * `template`, `unescape`, `uniqueId`, and `value`
     *
     * The wrapper functions `first` and `last` return wrapped values when `n` is
     * provided, otherwise they return unwrapped values.
     *
     * Explicit chaining can be enabled by using the `_.chain` method.
     *
     * @name _
     * @constructor
     * @category Chaining
     * @param {*} value The value to wrap in a `lodash` instance.
     * @returns {Object} Returns a `lodash` instance.
     * @example
     *
     * var wrapped = _([1, 2, 3]);
     *
     * // returns an unwrapped value
     * wrapped.reduce(function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * // returns a wrapped value
     * var squares = wrapped.map(function(num) {
     *   return num * num;
     * });
     *
     * _.isArray(squares);
     * // => false
     *
     * _.isArray(squares.value());
     * // => true
     */
    function lodash(value) {
      // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
      return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
       ? value
       : new lodashWrapper(value);
    }

    /**
     * A fast path for creating `lodash` wrapper objects.
     *
     * @private
     * @param {*} value The value to wrap in a `lodash` instance.
     * @param {boolean} chainAll A flag to enable chaining for all methods
     * @returns {Object} Returns a `lodash` instance.
     */
    function lodashWrapper(value, chainAll) {
      this.__chain__ = !!chainAll;
      this.__wrapped__ = value;
    }
    // ensure `new lodashWrapper` is an instance of `lodash`
    lodashWrapper.prototype = lodash.prototype;

    /**
     * An object used to flag environments features.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    var support = lodash.support = {};

    /**
     * Detect if functions can be decompiled by `Function#toString`
     * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
     *
     * @memberOf _.support
     * @type boolean
     */
    support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext);

    /**
     * Detect if `Function#name` is supported (all but IE).
     *
     * @memberOf _.support
     * @type boolean
     */
    support.funcNames = typeof Function.name == 'string';

    /**
     * By default, the template delimiters used by Lo-Dash are similar to those in
     * embedded Ruby (ERB). Change the following template settings to use alternative
     * delimiters.
     *
     * @static
     * @memberOf _
     * @type Object
     */
    lodash.templateSettings = {

      /**
       * Used to detect `data` property values to be HTML-escaped.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'escape': /<%-([\s\S]+?)%>/g,

      /**
       * Used to detect code to be evaluated.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'evaluate': /<%([\s\S]+?)%>/g,

      /**
       * Used to detect `data` property values to inject.
       *
       * @memberOf _.templateSettings
       * @type RegExp
       */
      'interpolate': reInterpolate,

      /**
       * Used to reference the data object in the template text.
       *
       * @memberOf _.templateSettings
       * @type string
       */
      'variable': '',

      /**
       * Used to import variables into the compiled template.
       *
       * @memberOf _.templateSettings
       * @type Object
       */
      'imports': {

        /**
         * A reference to the `lodash` function.
         *
         * @memberOf _.templateSettings.imports
         * @type Function
         */
        '_': lodash
      }
    };

    /*--------------------------------------------------------------------------*/

    /**
     * The base implementation of `_.bind` that creates the bound function and
     * sets its meta data.
     *
     * @private
     * @param {Array} bindData The bind data array.
     * @returns {Function} Returns the new bound function.
     */
    function baseBind(bindData) {
      var func = bindData[0],
          partialArgs = bindData[2],
          thisArg = bindData[4];

      function bound() {
        // `Function#bind` spec
        // http://es5.github.io/#x15.3.4.5
        if (partialArgs) {
          // avoid `arguments` object deoptimizations by using `slice` instead
          // of `Array.prototype.slice.call` and not assigning `arguments` to a
          // variable as a ternary expression
          var args = slice(partialArgs);
          push.apply(args, arguments);
        }
        // mimic the constructor's `return` behavior
        // http://es5.github.io/#x13.2.2
        if (this instanceof bound) {
          // ensure `new bound` is an instance of `func`
          var thisBinding = baseCreate(func.prototype),
              result = func.apply(thisBinding, args || arguments);
          return isObject(result) ? result : thisBinding;
        }
        return func.apply(thisArg, args || arguments);
      }
      setBindData(bound, bindData);
      return bound;
    }

    /**
     * The base implementation of `_.clone` without argument juggling or support
     * for `thisArg` binding.
     *
     * @private
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep=false] Specify a deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates clones with source counterparts.
     * @returns {*} Returns the cloned value.
     */
    function baseClone(value, isDeep, callback, stackA, stackB) {
      if (callback) {
        var result = callback(value);
        if (typeof result != 'undefined') {
          return result;
        }
      }
      // inspect [[Class]]
      var isObj = isObject(value);
      if (isObj) {
        var className = toString.call(value);
        if (!cloneableClasses[className]) {
          return value;
        }
        var ctor = ctorByClass[className];
        switch (className) {
          case boolClass:
          case dateClass:
            return new ctor(+value);

          case numberClass:
          case stringClass:
            return new ctor(value);

          case regexpClass:
            result = ctor(value.source, reFlags.exec(value));
            result.lastIndex = value.lastIndex;
            return result;
        }
      } else {
        return value;
      }
      var isArr = isArray(value);
      if (isDeep) {
        // check for circular references and return corresponding clone
        var initedStack = !stackA;
        stackA || (stackA = getArray());
        stackB || (stackB = getArray());

        var length = stackA.length;
        while (length--) {
          if (stackA[length] == value) {
            return stackB[length];
          }
        }
        result = isArr ? ctor(value.length) : {};
      }
      else {
        result = isArr ? slice(value) : assign({}, value);
      }
      // add array properties assigned by `RegExp#exec`
      if (isArr) {
        if (hasOwnProperty.call(value, 'index')) {
          result.index = value.index;
        }
        if (hasOwnProperty.call(value, 'input')) {
          result.input = value.input;
        }
      }
      // exit for shallow clone
      if (!isDeep) {
        return result;
      }
      // add the source value to the stack of traversed objects
      // and associate it with its clone
      stackA.push(value);
      stackB.push(result);

      // recursively populate clone (susceptible to call stack limits)
      (isArr ? forEach : forOwn)(value, function(objValue, key) {
        result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
      });

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * The base implementation of `_.create` without support for assigning
     * properties to the created object.
     *
     * @private
     * @param {Object} prototype The object to inherit from.
     * @returns {Object} Returns the new object.
     */
    function baseCreate(prototype, properties) {
      return isObject(prototype) ? nativeCreate(prototype) : {};
    }
    // fallback for browsers without `Object.create`
    if (!nativeCreate) {
      baseCreate = (function() {
        function Object() {}
        return function(prototype) {
          if (isObject(prototype)) {
            Object.prototype = prototype;
            var result = new Object;
            Object.prototype = null;
          }
          return result || context.Object();
        };
      }());
    }

    /**
     * The base implementation of `_.createCallback` without support for creating
     * "_.pluck" or "_.where" style callbacks.
     *
     * @private
     * @param {*} [func=identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of the created callback.
     * @param {number} [argCount] The number of arguments the callback accepts.
     * @returns {Function} Returns a callback function.
     */
    function baseCreateCallback(func, thisArg, argCount) {
      if (typeof func != 'function') {
        return identity;
      }
      // exit early for no `thisArg` or already bound by `Function#bind`
      if (typeof thisArg == 'undefined' || !('prototype' in func)) {
        return func;
      }
      var bindData = func.__bindData__;
      if (typeof bindData == 'undefined') {
        if (support.funcNames) {
          bindData = !func.name;
        }
        bindData = bindData || !support.funcDecomp;
        if (!bindData) {
          var source = fnToString.call(func);
          if (!support.funcNames) {
            bindData = !reFuncName.test(source);
          }
          if (!bindData) {
            // checks if `func` references the `this` keyword and stores the result
            bindData = reThis.test(source);
            setBindData(func, bindData);
          }
        }
      }
      // exit early if there are no `this` references or `func` is bound
      if (bindData === false || (bindData !== true && bindData[1] & 1)) {
        return func;
      }
      switch (argCount) {
        case 1: return function(value) {
          return func.call(thisArg, value);
        };
        case 2: return function(a, b) {
          return func.call(thisArg, a, b);
        };
        case 3: return function(value, index, collection) {
          return func.call(thisArg, value, index, collection);
        };
        case 4: return function(accumulator, value, index, collection) {
          return func.call(thisArg, accumulator, value, index, collection);
        };
      }
      return bind(func, thisArg);
    }

    /**
     * The base implementation of `createWrapper` that creates the wrapper and
     * sets its meta data.
     *
     * @private
     * @param {Array} bindData The bind data array.
     * @returns {Function} Returns the new function.
     */
    function baseCreateWrapper(bindData) {
      var func = bindData[0],
          bitmask = bindData[1],
          partialArgs = bindData[2],
          partialRightArgs = bindData[3],
          thisArg = bindData[4],
          arity = bindData[5];

      var isBind = bitmask & 1,
          isBindKey = bitmask & 2,
          isCurry = bitmask & 4,
          isCurryBound = bitmask & 8,
          key = func;

      function bound() {
        var thisBinding = isBind ? thisArg : this;
        if (partialArgs) {
          var args = slice(partialArgs);
          push.apply(args, arguments);
        }
        if (partialRightArgs || isCurry) {
          args || (args = slice(arguments));
          if (partialRightArgs) {
            push.apply(args, partialRightArgs);
          }
          if (isCurry && args.length < arity) {
            bitmask |= 16 & ~32;
            return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
          }
        }
        args || (args = arguments);
        if (isBindKey) {
          func = thisBinding[key];
        }
        if (this instanceof bound) {
          thisBinding = baseCreate(func.prototype);
          var result = func.apply(thisBinding, args);
          return isObject(result) ? result : thisBinding;
        }
        return func.apply(thisBinding, args);
      }
      setBindData(bound, bindData);
      return bound;
    }

    /**
     * The base implementation of `_.difference` that accepts a single array
     * of values to exclude.
     *
     * @private
     * @param {Array} array The array to process.
     * @param {Array} [values] The array of values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     */
    function baseDifference(array, values) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          isLarge = length >= largeArraySize && indexOf === baseIndexOf,
          result = [];

      if (isLarge) {
        var cache = createCache(values);
        if (cache) {
          indexOf = cacheIndexOf;
          values = cache;
        } else {
          isLarge = false;
        }
      }
      while (++index < length) {
        var value = array[index];
        if (indexOf(values, value) < 0) {
          result.push(value);
        }
      }
      if (isLarge) {
        releaseObject(values);
      }
      return result;
    }

    /**
     * The base implementation of `_.flatten` without support for callback
     * shorthands or `thisArg` binding.
     *
     * @private
     * @param {Array} array The array to flatten.
     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
     * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects.
     * @param {number} [fromIndex=0] The index to start from.
     * @returns {Array} Returns a new flattened array.
     */
    function baseFlatten(array, isShallow, isStrict, fromIndex) {
      var index = (fromIndex || 0) - 1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];

        if (value && typeof value == 'object' && typeof value.length == 'number'
            && (isArray(value) || isArguments(value))) {
          // recursively flatten arrays (susceptible to call stack limits)
          if (!isShallow) {
            value = baseFlatten(value, isShallow, isStrict);
          }
          var valIndex = -1,
              valLength = value.length,
              resIndex = result.length;

          result.length += valLength;
          while (++valIndex < valLength) {
            result[resIndex++] = value[valIndex];
          }
        } else if (!isStrict) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * The base implementation of `_.isEqual`, without support for `thisArg` binding,
     * that allows partial "_.where" style comparisons.
     *
     * @private
     * @param {*} a The value to compare.
     * @param {*} b The other value to compare.
     * @param {Function} [callback] The function to customize comparing values.
     * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons.
     * @param {Array} [stackA=[]] Tracks traversed `a` objects.
     * @param {Array} [stackB=[]] Tracks traversed `b` objects.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     */
    function baseIsEqual(a, b, callback, isWhere, stackA, stackB) {
      // used to indicate that when comparing objects, `a` has at least the properties of `b`
      if (callback) {
        var result = callback(a, b);
        if (typeof result != 'undefined') {
          return !!result;
        }
      }
      // exit early for identical values
      if (a === b) {
        // treat `+0` vs. `-0` as not equal
        return a !== 0 || (1 / a == 1 / b);
      }
      var type = typeof a,
          otherType = typeof b;

      // exit early for unlike primitive values
      if (a === a &&
          !(a && objectTypes[type]) &&
          !(b && objectTypes[otherType])) {
        return false;
      }
      // exit early for `null` and `undefined` avoiding ES3's Function#call behavior
      // http://es5.github.io/#x15.3.4.4
      if (a == null || b == null) {
        return a === b;
      }
      // compare [[Class]] names
      var className = toString.call(a),
          otherClass = toString.call(b);

      if (className == argsClass) {
        className = objectClass;
      }
      if (otherClass == argsClass) {
        otherClass = objectClass;
      }
      if (className != otherClass) {
        return false;
      }
      switch (className) {
        case boolClass:
        case dateClass:
          // coerce dates and booleans to numbers, dates to milliseconds and booleans
          // to `1` or `0` treating invalid dates coerced to `NaN` as not equal
          return +a == +b;

        case numberClass:
          // treat `NaN` vs. `NaN` as equal
          return (a != +a)
            ? b != +b
            // but treat `+0` vs. `-0` as not equal
            : (a == 0 ? (1 / a == 1 / b) : a == +b);

        case regexpClass:
        case stringClass:
          // coerce regexes to strings (http://es5.github.io/#x15.10.6.4)
          // treat string primitives and their corresponding object instances as equal
          return a == String(b);
      }
      var isArr = className == arrayClass;
      if (!isArr) {
        // unwrap any `lodash` wrapped values
        var aWrapped = hasOwnProperty.call(a, '__wrapped__'),
            bWrapped = hasOwnProperty.call(b, '__wrapped__');

        if (aWrapped || bWrapped) {
          return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB);
        }
        // exit for functions and DOM nodes
        if (className != objectClass) {
          return false;
        }
        // in older versions of Opera, `arguments` objects have `Array` constructors
        var ctorA = a.constructor,
            ctorB = b.constructor;

        // non `Object` object instances with different constructors are not equal
        if (ctorA != ctorB &&
              !(isFunction(ctorA) && ctorA instanceof ctorA && isFunction(ctorB) && ctorB instanceof ctorB) &&
              ('constructor' in a && 'constructor' in b)
            ) {
          return false;
        }
      }
      // assume cyclic structures are equal
      // the algorithm for detecting cyclic structures is adapted from ES 5.1
      // section 15.12.3, abstract operation `JO` (http://es5.github.io/#x15.12.3)
      var initedStack = !stackA;
      stackA || (stackA = getArray());
      stackB || (stackB = getArray());

      var length = stackA.length;
      while (length--) {
        if (stackA[length] == a) {
          return stackB[length] == b;
        }
      }
      var size = 0;
      result = true;

      // add `a` and `b` to the stack of traversed objects
      stackA.push(a);
      stackB.push(b);

      // recursively compare objects and arrays (susceptible to call stack limits)
      if (isArr) {
        // compare lengths to determine if a deep comparison is necessary
        length = a.length;
        size = b.length;
        result = size == length;

        if (result || isWhere) {
          // deep compare the contents, ignoring non-numeric properties
          while (size--) {
            var index = length,
                value = b[size];

            if (isWhere) {
              while (index--) {
                if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) {
                  break;
                }
              }
            } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) {
              break;
            }
          }
        }
      }
      else {
        // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
        // which, in this case, is more costly
        forIn(b, function(value, key, b) {
          if (hasOwnProperty.call(b, key)) {
            // count the number of properties.
            size++;
            // deep compare each property value.
            return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB));
          }
        });

        if (result && !isWhere) {
          // ensure both objects have the same number of properties
          forIn(a, function(value, key, a) {
            if (hasOwnProperty.call(a, key)) {
              // `size` will be `-1` if `a` has more properties than `b`
              return (result = --size > -1);
            }
          });
        }
      }
      stackA.pop();
      stackB.pop();

      if (initedStack) {
        releaseArray(stackA);
        releaseArray(stackB);
      }
      return result;
    }

    /**
     * The base implementation of `_.merge` without argument juggling or support
     * for `thisArg` binding.
     *
     * @private
     * @param {Object} object The destination object.
     * @param {Object} source The source object.
     * @param {Function} [callback] The function to customize merging properties.
     * @param {Array} [stackA=[]] Tracks traversed source objects.
     * @param {Array} [stackB=[]] Associates values with source counterparts.
     */
    function baseMerge(object, source, callback, stackA, stackB) {
      (isArray(source) ? forEach : forOwn)(source, function(source, key) {
        var found,
            isArr,
            result = source,
            value = object[key];

        if (source && ((isArr = isArray(source)) || isPlainObject(source))) {
          // avoid merging previously merged cyclic sources
          var stackLength = stackA.length;
          while (stackLength--) {
            if ((found = stackA[stackLength] == source)) {
              value = stackB[stackLength];
              break;
            }
          }
          if (!found) {
            var isShallow;
            if (callback) {
              result = callback(value, source);
              if ((isShallow = typeof result != 'undefined')) {
                value = result;
              }
            }
            if (!isShallow) {
              value = isArr
                ? (isArray(value) ? value : [])
                : (isPlainObject(value) ? value : {});
            }
            // add `source` and associated `value` to the stack of traversed objects
            stackA.push(source);
            stackB.push(value);

            // recursively merge objects and arrays (susceptible to call stack limits)
            if (!isShallow) {
              baseMerge(value, source, callback, stackA, stackB);
            }
          }
        }
        else {
          if (callback) {
            result = callback(value, source);
            if (typeof result == 'undefined') {
              result = source;
            }
          }
          if (typeof result != 'undefined') {
            value = result;
          }
        }
        object[key] = value;
      });
    }

    /**
     * The base implementation of `_.random` without argument juggling or support
     * for returning floating-point numbers.
     *
     * @private
     * @param {number} min The minimum possible value.
     * @param {number} max The maximum possible value.
     * @returns {number} Returns a random number.
     */
    function baseRandom(min, max) {
      return min + floor(nativeRandom() * (max - min + 1));
    }

    /**
     * The base implementation of `_.uniq` without support for callback shorthands
     * or `thisArg` binding.
     *
     * @private
     * @param {Array} array The array to process.
     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
     * @param {Function} [callback] The function called per iteration.
     * @returns {Array} Returns a duplicate-value-free array.
     */
    function baseUniq(array, isSorted, callback) {
      var index = -1,
          indexOf = getIndexOf(),
          length = array ? array.length : 0,
          result = [];

      var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf,
          seen = (callback || isLarge) ? getArray() : result;

      if (isLarge) {
        var cache = createCache(seen);
        indexOf = cacheIndexOf;
        seen = cache;
      }
      while (++index < length) {
        var value = array[index],
            computed = callback ? callback(value, index, array) : value;

        if (isSorted
              ? !index || seen[seen.length - 1] !== computed
              : indexOf(seen, computed) < 0
            ) {
          if (callback || isLarge) {
            seen.push(computed);
          }
          result.push(value);
        }
      }
      if (isLarge) {
        releaseArray(seen.array);
        releaseObject(seen);
      } else if (callback) {
        releaseArray(seen);
      }
      return result;
    }

    /**
     * Creates a function that aggregates a collection, creating an object composed
     * of keys generated from the results of running each element of the collection
     * through a callback. The given `setter` function sets the keys and values
     * of the composed object.
     *
     * @private
     * @param {Function} setter The setter function.
     * @returns {Function} Returns the new aggregator function.
     */
    function createAggregator(setter) {
      return function(collection, callback, thisArg) {
        var result = {};
        callback = lodash.createCallback(callback, thisArg, 3);

        var index = -1,
            length = collection ? collection.length : 0;

        if (typeof length == 'number') {
          while (++index < length) {
            var value = collection[index];
            setter(result, value, callback(value, index, collection), collection);
          }
        } else {
          forOwn(collection, function(value, key, collection) {
            setter(result, value, callback(value, key, collection), collection);
          });
        }
        return result;
      };
    }

    /**
     * Creates a function that, when called, either curries or invokes `func`
     * with an optional `this` binding and partially applied arguments.
     *
     * @private
     * @param {Function|string} func The function or method name to reference.
     * @param {number} bitmask The bitmask of method flags to compose.
     *  The bitmask may be composed of the following flags:
     *  1 - `_.bind`
     *  2 - `_.bindKey`
     *  4 - `_.curry`
     *  8 - `_.curry` (bound)
     *  16 - `_.partial`
     *  32 - `_.partialRight`
     * @param {Array} [partialArgs] An array of arguments to prepend to those
     *  provided to the new function.
     * @param {Array} [partialRightArgs] An array of arguments to append to those
     *  provided to the new function.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {number} [arity] The arity of `func`.
     * @returns {Function} Returns the new function.
     */
    function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
      var isBind = bitmask & 1,
          isBindKey = bitmask & 2,
          isCurry = bitmask & 4,
          isCurryBound = bitmask & 8,
          isPartial = bitmask & 16,
          isPartialRight = bitmask & 32;

      if (!isBindKey && !isFunction(func)) {
        throw new TypeError;
      }
      if (isPartial && !partialArgs.length) {
        bitmask &= ~16;
        isPartial = partialArgs = false;
      }
      if (isPartialRight && !partialRightArgs.length) {
        bitmask &= ~32;
        isPartialRight = partialRightArgs = false;
      }
      var bindData = func && func.__bindData__;
      if (bindData && bindData !== true) {
        // clone `bindData`
        bindData = slice(bindData);
        if (bindData[2]) {
          bindData[2] = slice(bindData[2]);
        }
        if (bindData[3]) {
          bindData[3] = slice(bindData[3]);
        }
        // set `thisBinding` is not previously bound
        if (isBind && !(bindData[1] & 1)) {
          bindData[4] = thisArg;
        }
        // set if previously bound but not currently (subsequent curried functions)
        if (!isBind && bindData[1] & 1) {
          bitmask |= 8;
        }
        // set curried arity if not yet set
        if (isCurry && !(bindData[1] & 4)) {
          bindData[5] = arity;
        }
        // append partial left arguments
        if (isPartial) {
          push.apply(bindData[2] || (bindData[2] = []), partialArgs);
        }
        // append partial right arguments
        if (isPartialRight) {
          unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
        }
        // merge flags
        bindData[1] |= bitmask;
        return createWrapper.apply(null, bindData);
      }
      // fast path for `_.bind`
      var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
      return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
    }

    /**
     * Used by `escape` to convert characters to HTML entities.
     *
     * @private
     * @param {string} match The matched character to escape.
     * @returns {string} Returns the escaped character.
     */
    function escapeHtmlChar(match) {
      return htmlEscapes[match];
    }

    /**
     * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
     * customized, this method returns the custom method, otherwise it returns
     * the `baseIndexOf` function.
     *
     * @private
     * @returns {Function} Returns the "indexOf" function.
     */
    function getIndexOf() {
      var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result;
      return result;
    }

    /**
     * Checks if `value` is a native function.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
     */
    function isNative(value) {
      return typeof value == 'function' && reNative.test(value);
    }

    /**
     * Sets `this` binding data on a given function.
     *
     * @private
     * @param {Function} func The function to set data on.
     * @param {Array} value The data array to set.
     */
    var setBindData = !defineProperty ? noop : function(func, value) {
      descriptor.value = value;
      defineProperty(func, '__bindData__', descriptor);
    };

    /**
     * A fallback implementation of `isPlainObject` which checks if a given value
     * is an object created by the `Object` constructor, assuming objects created
     * by the `Object` constructor have no inherited enumerable properties and that
     * there are no `Object.prototype` extensions.
     *
     * @private
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     */
    function shimIsPlainObject(value) {
      var ctor,
          result;

      // avoid non Object objects, `arguments` objects, and DOM elements
      if (!(value && toString.call(value) == objectClass) ||
          (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor))) {
        return false;
      }
      // In most environments an object's own properties are iterated before
      // its inherited properties. If the last iterated property is an object's
      // own property then there are no inherited enumerable properties.
      forIn(value, function(value, key) {
        result = key;
      });
      return typeof result == 'undefined' || hasOwnProperty.call(value, result);
    }

    /**
     * Used by `unescape` to convert HTML entities to characters.
     *
     * @private
     * @param {string} match The matched character to unescape.
     * @returns {string} Returns the unescaped character.
     */
    function unescapeHtmlChar(match) {
      return htmlUnescapes[match];
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Checks if `value` is an `arguments` object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an `arguments` object, else `false`.
     * @example
     *
     * (function() { return _.isArguments(arguments); })(1, 2, 3);
     * // => true
     *
     * _.isArguments([1, 2, 3]);
     * // => false
     */
    function isArguments(value) {
      return value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == argsClass || false;
    }

    /**
     * Checks if `value` is an array.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an array, else `false`.
     * @example
     *
     * (function() { return _.isArray(arguments); })();
     * // => false
     *
     * _.isArray([1, 2, 3]);
     * // => true
     */
    var isArray = nativeIsArray || function(value) {
      return value && typeof value == 'object' && typeof value.length == 'number' &&
        toString.call(value) == arrayClass || false;
    };

    /**
     * A fallback implementation of `Object.keys` which produces an array of the
     * given object's own enumerable property names.
     *
     * @private
     * @type Function
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names.
     */
    var shimKeys = function(object) {
      var index, iterable = object, result = [];
      if (!iterable) return result;
      if (!(objectTypes[typeof object])) return result;
        for (index in iterable) {
          if (hasOwnProperty.call(iterable, index)) {
            result.push(index);
          }
        }
      return result
    };

    /**
     * Creates an array composed of the own enumerable property names of an object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names.
     * @example
     *
     * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
     * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
     */
    var keys = !nativeKeys ? shimKeys : function(object) {
      if (!isObject(object)) {
        return [];
      }
      return nativeKeys(object);
    };

    /**
     * Used to convert characters to HTML entities:
     *
     * Though the `>` character is escaped for symmetry, characters like `>` and `/`
     * don't require escaping in HTML and have no special meaning unless they're part
     * of a tag or an unquoted attribute value.
     * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
     */
    var htmlEscapes = {
      '&': '&amp;',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;'
    };

    /** Used to convert HTML entities to characters */
    var htmlUnescapes = invert(htmlEscapes);

    /** Used to match HTML entities and HTML characters */
    var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'),
        reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g');

    /*--------------------------------------------------------------------------*/

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object. Subsequent sources will overwrite property assignments of previous
     * sources. If a callback is provided it will be executed to produce the
     * assigned values. The callback is bound to `thisArg` and invoked with two
     * arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @type Function
     * @alias extend
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param {Function} [callback] The function to customize assigning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
     * // => { 'name': 'fred', 'employer': 'slate' }
     *
     * var defaults = _.partialRight(_.assign, function(a, b) {
     *   return typeof a == 'undefined' ? b : a;
     * });
     *
     * var object = { 'name': 'barney' };
     * defaults(object, { 'name': 'fred', 'employer': 'slate' });
     * // => { 'name': 'barney', 'employer': 'slate' }
     */
    var assign = function(object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {
        var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);
      } else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {
        callback = args[--argsLength];
      }
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          result[index] = callback ? callback(result[index], iterable[index]) : iterable[index];
        }
        }
      }
      return result
    };

    /**
     * Creates a clone of `value`. If `isDeep` is `true` nested objects will also
     * be cloned, otherwise they will be assigned by reference. If a callback
     * is provided it will be executed to produce the cloned values. If the
     * callback returns `undefined` cloning will be handled by the method instead.
     * The callback is bound to `thisArg` and invoked with one argument; (value).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to clone.
     * @param {boolean} [isDeep=false] Specify a deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the cloned value.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * var shallow = _.clone(characters);
     * shallow[0] === characters[0];
     * // => true
     *
     * var deep = _.clone(characters, true);
     * deep[0] === characters[0];
     * // => false
     *
     * _.mixin({
     *   'clone': _.partialRight(_.clone, function(value) {
     *     return _.isElement(value) ? value.cloneNode(false) : undefined;
     *   })
     * });
     *
     * var clone = _.clone(document.body);
     * clone.childNodes.length;
     * // => 0
     */
    function clone(value, isDeep, callback, thisArg) {
      // allows working with "Collections" methods without using their `index`
      // and `collection` arguments for `isDeep` and `callback`
      if (typeof isDeep != 'boolean' && isDeep != null) {
        thisArg = callback;
        callback = isDeep;
        isDeep = false;
      }
      return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
    }

    /**
     * Creates a deep clone of `value`. If a callback is provided it will be
     * executed to produce the cloned values. If the callback returns `undefined`
     * cloning will be handled by the method instead. The callback is bound to
     * `thisArg` and invoked with one argument; (value).
     *
     * Note: This method is loosely based on the structured clone algorithm. Functions
     * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
     * objects created by constructors other than `Object` are cloned to plain `Object` objects.
     * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to deep clone.
     * @param {Function} [callback] The function to customize cloning values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the deep cloned value.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * var deep = _.cloneDeep(characters);
     * deep[0] === characters[0];
     * // => false
     *
     * var view = {
     *   'label': 'docs',
     *   'node': element
     * };
     *
     * var clone = _.cloneDeep(view, function(value) {
     *   return _.isElement(value) ? value.cloneNode(true) : undefined;
     * });
     *
     * clone.node == view.node;
     * // => false
     */
    function cloneDeep(value, callback, thisArg) {
      return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
    }

    /**
     * Creates an object that inherits from the given `prototype` object. If a
     * `properties` object is provided its own enumerable properties are assigned
     * to the created object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} prototype The object to inherit from.
     * @param {Object} [properties] The properties to assign to the object.
     * @returns {Object} Returns the new object.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * function Circle() {
     *   Shape.call(this);
     * }
     *
     * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle });
     *
     * var circle = new Circle;
     * circle instanceof Circle;
     * // => true
     *
     * circle instanceof Shape;
     * // => true
     */
    function create(prototype, properties) {
      var result = baseCreate(prototype);
      return properties ? assign(result, properties) : result;
    }

    /**
     * Assigns own enumerable properties of source object(s) to the destination
     * object for all destination properties that resolve to `undefined`. Once a
     * property is set, additional defaults of the same property will be ignored.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param- {Object} [guard] Allows working with `_.reduce` without using its
     *  `key` and `object` arguments as sources.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var object = { 'name': 'barney' };
     * _.defaults(object, { 'name': 'fred', 'employer': 'slate' });
     * // => { 'name': 'barney', 'employer': 'slate' }
     */
    var defaults = function(object, source, guard) {
      var index, iterable = object, result = iterable;
      if (!iterable) return result;
      var args = arguments,
          argsIndex = 0,
          argsLength = typeof guard == 'number' ? 2 : args.length;
      while (++argsIndex < argsLength) {
        iterable = args[argsIndex];
        if (iterable && objectTypes[typeof iterable]) {
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (typeof result[index] == 'undefined') result[index] = iterable[index];
        }
        }
      }
      return result
    };

    /**
     * This method is like `_.findIndex` except that it returns the key of the
     * first element that passes the callback check, instead of the element itself.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [callback=identity] The function called per
     *  iteration. If a property name or object is provided it will be used to
     *  create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
     * @example
     *
     * var characters = {
     *   'barney': {  'age': 36, 'blocked': false },
     *   'fred': {    'age': 40, 'blocked': true },
     *   'pebbles': { 'age': 1,  'blocked': false }
     * };
     *
     * _.findKey(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => 'barney' (property order is not guaranteed across environments)
     *
     * // using "_.where" callback shorthand
     * _.findKey(characters, { 'age': 1 });
     * // => 'pebbles'
     *
     * // using "_.pluck" callback shorthand
     * _.findKey(characters, 'blocked');
     * // => 'fred'
     */
    function findKey(object, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forOwn(object, function(value, key, object) {
        if (callback(value, key, object)) {
          result = key;
          return false;
        }
      });
      return result;
    }

    /**
     * This method is like `_.findKey` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to search.
     * @param {Function|Object|string} [callback=identity] The function called per
     *  iteration. If a property name or object is provided it will be used to
     *  create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {string|undefined} Returns the key of the found element, else `undefined`.
     * @example
     *
     * var characters = {
     *   'barney': {  'age': 36, 'blocked': true },
     *   'fred': {    'age': 40, 'blocked': false },
     *   'pebbles': { 'age': 1,  'blocked': true }
     * };
     *
     * _.findLastKey(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => returns `pebbles`, assuming `_.findKey` returns `barney`
     *
     * // using "_.where" callback shorthand
     * _.findLastKey(characters, { 'age': 40 });
     * // => 'fred'
     *
     * // using "_.pluck" callback shorthand
     * _.findLastKey(characters, 'blocked');
     * // => 'pebbles'
     */
    function findLastKey(object, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forOwnRight(object, function(value, key, object) {
        if (callback(value, key, object)) {
          result = key;
          return false;
        }
      });
      return result;
    }

    /**
     * Iterates over own and inherited enumerable properties of an object,
     * executing the callback for each property. The callback is bound to `thisArg`
     * and invoked with three arguments; (value, key, object). Callbacks may exit
     * iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * Shape.prototype.move = function(x, y) {
     *   this.x += x;
     *   this.y += y;
     * };
     *
     * _.forIn(new Shape, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments)
     */
    var forIn = function(collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
        for (index in iterable) {
          if (callback(iterable[index], index, collection) === false) return result;
        }
      return result
    };

    /**
     * This method is like `_.forIn` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * Shape.prototype.move = function(x, y) {
     *   this.x += x;
     *   this.y += y;
     * };
     *
     * _.forInRight(new Shape, function(value, key) {
     *   console.log(key);
     * });
     * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move'
     */
    function forInRight(object, callback, thisArg) {
      var pairs = [];

      forIn(object, function(value, key) {
        pairs.push(key, value);
      });

      var length = pairs.length;
      callback = baseCreateCallback(callback, thisArg, 3);
      while (length--) {
        if (callback(pairs[length--], pairs[length], object) === false) {
          break;
        }
      }
      return object;
    }

    /**
     * Iterates over own enumerable properties of an object, executing the callback
     * for each property. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, key, object). Callbacks may exit iteration early by
     * explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
     *   console.log(key);
     * });
     * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
     */
    var forOwn = function(collection, callback, thisArg) {
      var index, iterable = collection, result = iterable;
      if (!iterable) return result;
      if (!objectTypes[typeof iterable]) return result;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
        var ownIndex = -1,
            ownProps = objectTypes[typeof iterable] && keys(iterable),
            length = ownProps ? ownProps.length : 0;

        while (++ownIndex < length) {
          index = ownProps[ownIndex];
          if (callback(iterable[index], index, collection) === false) return result;
        }
      return result
    };

    /**
     * This method is like `_.forOwn` except that it iterates over elements
     * of a `collection` in the opposite order.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns `object`.
     * @example
     *
     * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
     *   console.log(key);
     * });
     * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length'
     */
    function forOwnRight(object, callback, thisArg) {
      var props = keys(object),
          length = props.length;

      callback = baseCreateCallback(callback, thisArg, 3);
      while (length--) {
        var key = props[length];
        if (callback(object[key], key, object) === false) {
          break;
        }
      }
      return object;
    }

    /**
     * Creates a sorted array of property names of all enumerable properties,
     * own and inherited, of `object` that have function values.
     *
     * @static
     * @memberOf _
     * @alias methods
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property names that have function values.
     * @example
     *
     * _.functions(_);
     * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
     */
    function functions(object) {
      var result = [];
      forIn(object, function(value, key) {
        if (isFunction(value)) {
          result.push(key);
        }
      });
      return result.sort();
    }

    /**
     * Checks if the specified property name exists as a direct property of `object`,
     * instead of an inherited property.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @param {string} key The name of the property to check.
     * @returns {boolean} Returns `true` if key is a direct property, else `false`.
     * @example
     *
     * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
     * // => true
     */
    function has(object, key) {
      return object ? hasOwnProperty.call(object, key) : false;
    }

    /**
     * Creates an object composed of the inverted keys and values of the given object.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to invert.
     * @returns {Object} Returns the created inverted object.
     * @example
     *
     * _.invert({ 'first': 'fred', 'second': 'barney' });
     * // => { 'fred': 'first', 'barney': 'second' }
     */
    function invert(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = {};

      while (++index < length) {
        var key = props[index];
        result[object[key]] = key;
      }
      return result;
    }

    /**
     * Checks if `value` is a boolean value.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`.
     * @example
     *
     * _.isBoolean(null);
     * // => false
     */
    function isBoolean(value) {
      return value === true || value === false ||
        value && typeof value == 'object' && toString.call(value) == boolClass || false;
    }

    /**
     * Checks if `value` is a date.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a date, else `false`.
     * @example
     *
     * _.isDate(new Date);
     * // => true
     */
    function isDate(value) {
      return value && typeof value == 'object' && toString.call(value) == dateClass || false;
    }

    /**
     * Checks if `value` is a DOM element.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`.
     * @example
     *
     * _.isElement(document.body);
     * // => true
     */
    function isElement(value) {
      return value && value.nodeType === 1 || false;
    }

    /**
     * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
     * length of `0` and objects with no own enumerable properties are considered
     * "empty".
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object|string} value The value to inspect.
     * @returns {boolean} Returns `true` if the `value` is empty, else `false`.
     * @example
     *
     * _.isEmpty([1, 2, 3]);
     * // => false
     *
     * _.isEmpty({});
     * // => true
     *
     * _.isEmpty('');
     * // => true
     */
    function isEmpty(value) {
      var result = true;
      if (!value) {
        return result;
      }
      var className = toString.call(value),
          length = value.length;

      if ((className == arrayClass || className == stringClass || className == argsClass ) ||
          (className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
        return !length;
      }
      forOwn(value, function() {
        return (result = false);
      });
      return result;
    }

    /**
     * Performs a deep comparison between two values to determine if they are
     * equivalent to each other. If a callback is provided it will be executed
     * to compare values. If the callback returns `undefined` comparisons will
     * be handled by the method instead. The callback is bound to `thisArg` and
     * invoked with two arguments; (a, b).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} a The value to compare.
     * @param {*} b The other value to compare.
     * @param {Function} [callback] The function to customize comparing values.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
     * @example
     *
     * var object = { 'name': 'fred' };
     * var copy = { 'name': 'fred' };
     *
     * object == copy;
     * // => false
     *
     * _.isEqual(object, copy);
     * // => true
     *
     * var words = ['hello', 'goodbye'];
     * var otherWords = ['hi', 'goodbye'];
     *
     * _.isEqual(words, otherWords, function(a, b) {
     *   var reGreet = /^(?:hello|hi)$/i,
     *       aGreet = _.isString(a) && reGreet.test(a),
     *       bGreet = _.isString(b) && reGreet.test(b);
     *
     *   return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
     * });
     * // => true
     */
    function isEqual(a, b, callback, thisArg) {
      return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2));
    }

    /**
     * Checks if `value` is, or can be coerced to, a finite number.
     *
     * Note: This is not the same as native `isFinite` which will return true for
     * booleans and empty strings. See http://es5.github.io/#x15.1.2.5.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is finite, else `false`.
     * @example
     *
     * _.isFinite(-101);
     * // => true
     *
     * _.isFinite('10');
     * // => true
     *
     * _.isFinite(true);
     * // => false
     *
     * _.isFinite('');
     * // => false
     *
     * _.isFinite(Infinity);
     * // => false
     */
    function isFinite(value) {
      return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
    }

    /**
     * Checks if `value` is a function.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a function, else `false`.
     * @example
     *
     * _.isFunction(_);
     * // => true
     */
    function isFunction(value) {
      return typeof value == 'function';
    }

    /**
     * Checks if `value` is the language type of Object.
     * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is an object, else `false`.
     * @example
     *
     * _.isObject({});
     * // => true
     *
     * _.isObject([1, 2, 3]);
     * // => true
     *
     * _.isObject(1);
     * // => false
     */
    function isObject(value) {
      // check if the value is the ECMAScript language type of Object
      // http://es5.github.io/#x8
      // and avoid a V8 bug
      // http://code.google.com/p/v8/issues/detail?id=2291
      return !!(value && objectTypes[typeof value]);
    }

    /**
     * Checks if `value` is `NaN`.
     *
     * Note: This is not the same as native `isNaN` which will return `true` for
     * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`.
     * @example
     *
     * _.isNaN(NaN);
     * // => true
     *
     * _.isNaN(new Number(NaN));
     * // => true
     *
     * isNaN(undefined);
     * // => true
     *
     * _.isNaN(undefined);
     * // => false
     */
    function isNaN(value) {
      // `NaN` as a primitive is the only value that is not equal to itself
      // (perform the [[Class]] check first to avoid errors with some host objects in IE)
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is `null`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `null`, else `false`.
     * @example
     *
     * _.isNull(null);
     * // => true
     *
     * _.isNull(undefined);
     * // => false
     */
    function isNull(value) {
      return value === null;
    }

    /**
     * Checks if `value` is a number.
     *
     * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a number, else `false`.
     * @example
     *
     * _.isNumber(8.4 * 5);
     * // => true
     */
    function isNumber(value) {
      return typeof value == 'number' ||
        value && typeof value == 'object' && toString.call(value) == numberClass || false;
    }

    /**
     * Checks if `value` is an object created by the `Object` constructor.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
     * @example
     *
     * function Shape() {
     *   this.x = 0;
     *   this.y = 0;
     * }
     *
     * _.isPlainObject(new Shape);
     * // => false
     *
     * _.isPlainObject([1, 2, 3]);
     * // => false
     *
     * _.isPlainObject({ 'x': 0, 'y': 0 });
     * // => true
     */
    var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
      if (!(value && toString.call(value) == objectClass)) {
        return false;
      }
      var valueOf = value.valueOf,
          objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);

      return objProto
        ? (value == objProto || getPrototypeOf(value) == objProto)
        : shimIsPlainObject(value);
    };

    /**
     * Checks if `value` is a regular expression.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`.
     * @example
     *
     * _.isRegExp(/fred/);
     * // => true
     */
    function isRegExp(value) {
      return value && typeof value == 'object' && toString.call(value) == regexpClass || false;
    }

    /**
     * Checks if `value` is a string.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is a string, else `false`.
     * @example
     *
     * _.isString('fred');
     * // => true
     */
    function isString(value) {
      return typeof value == 'string' ||
        value && typeof value == 'object' && toString.call(value) == stringClass || false;
    }

    /**
     * Checks if `value` is `undefined`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {*} value The value to check.
     * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`.
     * @example
     *
     * _.isUndefined(void 0);
     * // => true
     */
    function isUndefined(value) {
      return typeof value == 'undefined';
    }

    /**
     * Creates an object with the same keys as `object` and values generated by
     * running each own enumerable property of `object` through the callback.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new object with values of the results of each `callback` execution.
     * @example
     *
     * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; });
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     *
     * var characters = {
     *   'fred': { 'name': 'fred', 'age': 40 },
     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
     * };
     *
     * // using "_.pluck" callback shorthand
     * _.mapValues(characters, 'age');
     * // => { 'fred': 40, 'pebbles': 1 }
     */
    function mapValues(object, callback, thisArg) {
      var result = {};
      callback = lodash.createCallback(callback, thisArg, 3);

      forOwn(object, function(value, key, object) {
        result[key] = callback(value, key, object);
      });
      return result;
    }

    /**
     * Recursively merges own enumerable properties of the source object(s), that
     * don't resolve to `undefined` into the destination object. Subsequent sources
     * will overwrite property assignments of previous sources. If a callback is
     * provided it will be executed to produce the merged values of the destination
     * and source properties. If the callback returns `undefined` merging will
     * be handled by the method instead. The callback is bound to `thisArg` and
     * invoked with two arguments; (objectValue, sourceValue).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The destination object.
     * @param {...Object} [source] The source objects.
     * @param {Function} [callback] The function to customize merging properties.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the destination object.
     * @example
     *
     * var names = {
     *   'characters': [
     *     { 'name': 'barney' },
     *     { 'name': 'fred' }
     *   ]
     * };
     *
     * var ages = {
     *   'characters': [
     *     { 'age': 36 },
     *     { 'age': 40 }
     *   ]
     * };
     *
     * _.merge(names, ages);
     * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
     *
     * var food = {
     *   'fruits': ['apple'],
     *   'vegetables': ['beet']
     * };
     *
     * var otherFood = {
     *   'fruits': ['banana'],
     *   'vegetables': ['carrot']
     * };
     *
     * _.merge(food, otherFood, function(a, b) {
     *   return _.isArray(a) ? a.concat(b) : undefined;
     * });
     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
     */
    function merge(object) {
      var args = arguments,
          length = 2;

      if (!isObject(object)) {
        return object;
      }
      // allows working with `_.reduce` and `_.reduceRight` without using
      // their `index` and `collection` arguments
      if (typeof args[2] != 'number') {
        length = args.length;
      }
      if (length > 3 && typeof args[length - 2] == 'function') {
        var callback = baseCreateCallback(args[--length - 1], args[length--], 2);
      } else if (length > 2 && typeof args[length - 1] == 'function') {
        callback = args[--length];
      }
      var sources = slice(arguments, 1, length),
          index = -1,
          stackA = getArray(),
          stackB = getArray();

      while (++index < length) {
        baseMerge(object, sources[index], callback, stackA, stackB);
      }
      releaseArray(stackA);
      releaseArray(stackB);
      return object;
    }

    /**
     * Creates a shallow clone of `object` excluding the specified properties.
     * Property names may be specified as individual arguments or as arrays of
     * property names. If a callback is provided it will be executed for each
     * property of `object` omitting the properties the callback returns truey
     * for. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Function|...string|string[]} [callback] The properties to omit or the
     *  function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object without the omitted properties.
     * @example
     *
     * _.omit({ 'name': 'fred', 'age': 40 }, 'age');
     * // => { 'name': 'fred' }
     *
     * _.omit({ 'name': 'fred', 'age': 40 }, function(value) {
     *   return typeof value == 'number';
     * });
     * // => { 'name': 'fred' }
     */
    function omit(object, callback, thisArg) {
      var result = {};
      if (typeof callback != 'function') {
        var props = [];
        forIn(object, function(value, key) {
          props.push(key);
        });
        props = baseDifference(props, baseFlatten(arguments, true, false, 1));

        var index = -1,
            length = props.length;

        while (++index < length) {
          var key = props[index];
          result[key] = object[key];
        }
      } else {
        callback = lodash.createCallback(callback, thisArg, 3);
        forIn(object, function(value, key, object) {
          if (!callback(value, key, object)) {
            result[key] = value;
          }
        });
      }
      return result;
    }

    /**
     * Creates a two dimensional array of an object's key-value pairs,
     * i.e. `[[key1, value1], [key2, value2]]`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns new array of key-value pairs.
     * @example
     *
     * _.pairs({ 'barney': 36, 'fred': 40 });
     * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments)
     */
    function pairs(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        var key = props[index];
        result[index] = [key, object[key]];
      }
      return result;
    }

    /**
     * Creates a shallow clone of `object` composed of the specified properties.
     * Property names may be specified as individual arguments or as arrays of
     * property names. If a callback is provided it will be executed for each
     * property of `object` picking the properties the callback returns truey
     * for. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, key, object).
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The source object.
     * @param {Function|...string|string[]} [callback] The function called per
     *  iteration or property names to pick, specified as individual property
     *  names or arrays of property names.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns an object composed of the picked properties.
     * @example
     *
     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name');
     * // => { 'name': 'fred' }
     *
     * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) {
     *   return key.charAt(0) != '_';
     * });
     * // => { 'name': 'fred' }
     */
    function pick(object, callback, thisArg) {
      var result = {};
      if (typeof callback != 'function') {
        var index = -1,
            props = baseFlatten(arguments, true, false, 1),
            length = isObject(object) ? props.length : 0;

        while (++index < length) {
          var key = props[index];
          if (key in object) {
            result[key] = object[key];
          }
        }
      } else {
        callback = lodash.createCallback(callback, thisArg, 3);
        forIn(object, function(value, key, object) {
          if (callback(value, key, object)) {
            result[key] = value;
          }
        });
      }
      return result;
    }

    /**
     * An alternative to `_.reduce` this method transforms `object` to a new
     * `accumulator` object which is the result of running each of its own
     * enumerable properties through a callback, with each callback execution
     * potentially mutating the `accumulator` object. The callback is bound to
     * `thisArg` and invoked with four arguments; (accumulator, value, key, object).
     * Callbacks may exit iteration early by explicitly returning `false`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Array|Object} object The object to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] The custom accumulator value.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) {
     *   num *= num;
     *   if (num % 2) {
     *     return result.push(num) < 3;
     *   }
     * });
     * // => [1, 9, 25]
     *
     * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     * });
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function transform(object, callback, accumulator, thisArg) {
      var isArr = isArray(object);
      if (accumulator == null) {
        if (isArr) {
          accumulator = [];
        } else {
          var ctor = object && object.constructor,
              proto = ctor && ctor.prototype;

          accumulator = baseCreate(proto);
        }
      }
      if (callback) {
        callback = lodash.createCallback(callback, thisArg, 4);
        (isArr ? forEach : forOwn)(object, function(value, index, object) {
          return callback(accumulator, value, index, object);
        });
      }
      return accumulator;
    }

    /**
     * Creates an array composed of the own enumerable property values of `object`.
     *
     * @static
     * @memberOf _
     * @category Objects
     * @param {Object} object The object to inspect.
     * @returns {Array} Returns an array of property values.
     * @example
     *
     * _.values({ 'one': 1, 'two': 2, 'three': 3 });
     * // => [1, 2, 3] (property order is not guaranteed across environments)
     */
    function values(object) {
      var index = -1,
          props = keys(object),
          length = props.length,
          result = Array(length);

      while (++index < length) {
        result[index] = object[props[index]];
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array of elements from the specified indexes, or keys, of the
     * `collection`. Indexes may be specified as individual arguments or as arrays
     * of indexes.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {...(number|number[]|string|string[])} [index] The indexes of `collection`
     *   to retrieve, specified as individual indexes or arrays of indexes.
     * @returns {Array} Returns a new array of elements corresponding to the
     *  provided indexes.
     * @example
     *
     * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
     * // => ['a', 'c', 'e']
     *
     * _.at(['fred', 'barney', 'pebbles'], 0, 2);
     * // => ['fred', 'pebbles']
     */
    function at(collection) {
      var args = arguments,
          index = -1,
          props = baseFlatten(args, true, false, 1),
          length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length,
          result = Array(length);

      while(++index < length) {
        result[index] = collection[props[index]];
      }
      return result;
    }

    /**
     * Checks if a given value is present in a collection using strict equality
     * for comparisons, i.e. `===`. If `fromIndex` is negative, it is used as the
     * offset from the end of the collection.
     *
     * @static
     * @memberOf _
     * @alias include
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {*} target The value to check for.
     * @param {number} [fromIndex=0] The index to search from.
     * @returns {boolean} Returns `true` if the `target` element is found, else `false`.
     * @example
     *
     * _.contains([1, 2, 3], 1);
     * // => true
     *
     * _.contains([1, 2, 3], 1, 2);
     * // => false
     *
     * _.contains({ 'name': 'fred', 'age': 40 }, 'fred');
     * // => true
     *
     * _.contains('pebbles', 'eb');
     * // => true
     */
    function contains(collection, target, fromIndex) {
      var index = -1,
          indexOf = getIndexOf(),
          length = collection ? collection.length : 0,
          result = false;

      fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
      if (isArray(collection)) {
        result = indexOf(collection, target, fromIndex) > -1;
      } else if (typeof length == 'number') {
        result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1;
      } else {
        forOwn(collection, function(value) {
          if (++index >= fromIndex) {
            return !(result = value === target);
          }
        });
      }
      return result;
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of `collection` through the callback. The corresponding value
     * of each key is the number of times the key was returned by the callback.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': 1, '6': 2 }
     *
     * _.countBy(['one', 'two', 'three'], 'length');
     * // => { '3': 2, '5': 1 }
     */
    var countBy = createAggregator(function(result, value, key) {
      (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
    });

    /**
     * Checks if the given callback returns truey value for **all** elements of
     * a collection. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias all
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if all elements passed the callback check,
     *  else `false`.
     * @example
     *
     * _.every([true, 1, null, 'yes']);
     * // => false
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.every(characters, 'age');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.every(characters, { 'age': 36 });
     * // => false
     */
    function every(collection, callback, thisArg) {
      var result = true;
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if (!(result = !!callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return (result = !!callback(value, index, collection));
        });
      }
      return result;
    }

    /**
     * Iterates over elements of a collection, returning an array of all elements
     * the callback returns truey for. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias select
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that passed the callback check.
     * @example
     *
     * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [2, 4, 6]
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.filter(characters, 'blocked');
     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
     *
     * // using "_.where" callback shorthand
     * _.filter(characters, { 'age': 36 });
     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
     */
    function filter(collection, callback, thisArg) {
      var result = [];
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            result.push(value);
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result.push(value);
          }
        });
      }
      return result;
    }

    /**
     * Iterates over elements of a collection, returning the first element that
     * the callback returns truey for. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias detect, findWhere
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the found element, else `undefined`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': false },
     *   { 'name': 'fred',    'age': 40, 'blocked': true },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
     * ];
     *
     * _.find(characters, function(chr) {
     *   return chr.age < 40;
     * });
     * // => { 'name': 'barney', 'age': 36, 'blocked': false }
     *
     * // using "_.where" callback shorthand
     * _.find(characters, { 'age': 1 });
     * // =>  { 'name': 'pebbles', 'age': 1, 'blocked': false }
     *
     * // using "_.pluck" callback shorthand
     * _.find(characters, 'blocked');
     * // => { 'name': 'fred', 'age': 40, 'blocked': true }
     */
    function find(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          var value = collection[index];
          if (callback(value, index, collection)) {
            return value;
          }
        }
      } else {
        var result;
        forOwn(collection, function(value, index, collection) {
          if (callback(value, index, collection)) {
            result = value;
            return false;
          }
        });
        return result;
      }
    }

    /**
     * This method is like `_.find` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the found element, else `undefined`.
     * @example
     *
     * _.findLast([1, 2, 3, 4], function(num) {
     *   return num % 2 == 1;
     * });
     * // => 3
     */
    function findLast(collection, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);
      forEachRight(collection, function(value, index, collection) {
        if (callback(value, index, collection)) {
          result = value;
          return false;
        }
      });
      return result;
    }

    /**
     * Iterates over elements of a collection, executing the callback for each
     * element. The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection). Callbacks may exit iteration early by
     * explicitly returning `false`.
     *
     * Note: As with other "Collections" methods, objects with a `length` property
     * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
     * may be used for object iteration.
     *
     * @static
     * @memberOf _
     * @alias each
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');
     * // => logs each number and returns '1,2,3'
     *
     * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });
     * // => logs each number and returns the object (property order is not guaranteed across environments)
     */
    function forEach(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        while (++index < length) {
          if (callback(collection[index], index, collection) === false) {
            break;
          }
        }
      } else {
        forOwn(collection, callback);
      }
      return collection;
    }

    /**
     * This method is like `_.forEach` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias eachRight
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array|Object|string} Returns `collection`.
     * @example
     *
     * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(',');
     * // => logs each number from right to left and returns '3,2,1'
     */
    function forEachRight(collection, callback, thisArg) {
      var length = collection ? collection.length : 0;
      callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        while (length--) {
          if (callback(collection[length], length, collection) === false) {
            break;
          }
        }
      } else {
        var props = keys(collection);
        length = props.length;
        forOwn(collection, function(value, key, collection) {
          key = props ? props[--length] : --length;
          return callback(collection[key], key, collection);
        });
      }
      return collection;
    }

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of a collection through the callback. The corresponding value
     * of each key is an array of the elements responsible for generating the key.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
     * // => { '4': [4.2], '6': [6.1, 6.4] }
     *
     * // using "_.pluck" callback shorthand
     * _.groupBy(['one', 'two', 'three'], 'length');
     * // => { '3': ['one', 'two'], '5': ['three'] }
     */
    var groupBy = createAggregator(function(result, value, key) {
      (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
    });

    /**
     * Creates an object composed of keys generated from the results of running
     * each element of the collection through the given callback. The corresponding
     * value of each key is the last element responsible for generating the key.
     * The callback is bound to `thisArg` and invoked with three arguments;
     * (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Object} Returns the composed aggregate object.
     * @example
     *
     * var keys = [
     *   { 'dir': 'left', 'code': 97 },
     *   { 'dir': 'right', 'code': 100 }
     * ];
     *
     * _.indexBy(keys, 'dir');
     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); });
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     *
     * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String);
     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
     */
    var indexBy = createAggregator(function(result, value, key) {
      result[key] = value;
    });

    /**
     * Invokes the method named by `methodName` on each element in the `collection`
     * returning an array of the results of each invoked method. Additional arguments
     * will be provided to each invoked method. If `methodName` is a function it
     * will be invoked for, and `this` bound to, each element in the `collection`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|string} methodName The name of the method to invoke or
     *  the function invoked per iteration.
     * @param {...*} [arg] Arguments to invoke the method with.
     * @returns {Array} Returns a new array of the results of each invoked method.
     * @example
     *
     * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
     * // => [[1, 5, 7], [1, 2, 3]]
     *
     * _.invoke([123, 456], String.prototype.split, '');
     * // => [['1', '2', '3'], ['4', '5', '6']]
     */
    function invoke(collection, methodName) {
      var args = slice(arguments, 2),
          index = -1,
          isFunc = typeof methodName == 'function',
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
      });
      return result;
    }

    /**
     * Creates an array of values by running each element in the collection
     * through the callback. The callback is bound to `thisArg` and invoked with
     * three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias collect
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of the results of each `callback` execution.
     * @example
     *
     * _.map([1, 2, 3], function(num) { return num * 3; });
     * // => [3, 6, 9]
     *
     * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
     * // => [3, 6, 9] (property order is not guaranteed across environments)
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.map(characters, 'name');
     * // => ['barney', 'fred']
     */
    function map(collection, callback, thisArg) {
      var index = -1,
          length = collection ? collection.length : 0;

      callback = lodash.createCallback(callback, thisArg, 3);
      if (typeof length == 'number') {
        var result = Array(length);
        while (++index < length) {
          result[index] = callback(collection[index], index, collection);
        }
      } else {
        result = [];
        forOwn(collection, function(value, key, collection) {
          result[++index] = callback(value, key, collection);
        });
      }
      return result;
    }

    /**
     * Retrieves the maximum value of a collection. If the collection is empty or
     * falsey `-Infinity` is returned. If a callback is provided it will be executed
     * for each value in the collection to generate the criterion by which the value
     * is ranked. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the maximum value.
     * @example
     *
     * _.max([4, 2, 8, 6]);
     * // => 8
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.max(characters, function(chr) { return chr.age; });
     * // => { 'name': 'fred', 'age': 40 };
     *
     * // using "_.pluck" callback shorthand
     * _.max(characters, 'age');
     * // => { 'name': 'fred', 'age': 40 };
     */
    function max(collection, callback, thisArg) {
      var computed = -Infinity,
          result = computed;

      // allows working with functions like `_.map` without using
      // their `index` argument as a callback
      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
        callback = null;
      }
      if (callback == null && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value > result) {
            result = value;
          }
        }
      } else {
        callback = (callback == null && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg, 3);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current > computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the minimum value of a collection. If the collection is empty or
     * falsey `Infinity` is returned. If a callback is provided it will be executed
     * for each value in the collection to generate the criterion by which the value
     * is ranked. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the minimum value.
     * @example
     *
     * _.min([4, 2, 8, 6]);
     * // => 2
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.min(characters, function(chr) { return chr.age; });
     * // => { 'name': 'barney', 'age': 36 };
     *
     * // using "_.pluck" callback shorthand
     * _.min(characters, 'age');
     * // => { 'name': 'barney', 'age': 36 };
     */
    function min(collection, callback, thisArg) {
      var computed = Infinity,
          result = computed;

      // allows working with functions like `_.map` without using
      // their `index` argument as a callback
      if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
        callback = null;
      }
      if (callback == null && isArray(collection)) {
        var index = -1,
            length = collection.length;

        while (++index < length) {
          var value = collection[index];
          if (value < result) {
            result = value;
          }
        }
      } else {
        callback = (callback == null && isString(collection))
          ? charAtCallback
          : lodash.createCallback(callback, thisArg, 3);

        forEach(collection, function(value, index, collection) {
          var current = callback(value, index, collection);
          if (current < computed) {
            computed = current;
            result = value;
          }
        });
      }
      return result;
    }

    /**
     * Retrieves the value of a specified property from all elements in the collection.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {string} property The name of the property to pluck.
     * @returns {Array} Returns a new array of property values.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * _.pluck(characters, 'name');
     * // => ['barney', 'fred']
     */
    var pluck = map;

    /**
     * Reduces a collection to a value which is the accumulated result of running
     * each element in the collection through the callback, where each successive
     * callback execution consumes the return value of the previous execution. If
     * `accumulator` is not provided the first element of the collection will be
     * used as the initial `accumulator` value. The callback is bound to `thisArg`
     * and invoked with four arguments; (accumulator, value, index|key, collection).
     *
     * @static
     * @memberOf _
     * @alias foldl, inject
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] Initial value of the accumulator.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var sum = _.reduce([1, 2, 3], function(sum, num) {
     *   return sum + num;
     * });
     * // => 6
     *
     * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
     *   result[key] = num * 3;
     *   return result;
     * }, {});
     * // => { 'a': 3, 'b': 6, 'c': 9 }
     */
    function reduce(collection, callback, accumulator, thisArg) {
      if (!collection) return accumulator;
      var noaccum = arguments.length < 3;
      callback = lodash.createCallback(callback, thisArg, 4);

      var index = -1,
          length = collection.length;

      if (typeof length == 'number') {
        if (noaccum) {
          accumulator = collection[++index];
        }
        while (++index < length) {
          accumulator = callback(accumulator, collection[index], index, collection);
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          accumulator = noaccum
            ? (noaccum = false, value)
            : callback(accumulator, value, index, collection)
        });
      }
      return accumulator;
    }

    /**
     * This method is like `_.reduce` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * @static
     * @memberOf _
     * @alias foldr
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function} [callback=identity] The function called per iteration.
     * @param {*} [accumulator] Initial value of the accumulator.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the accumulated value.
     * @example
     *
     * var list = [[0, 1], [2, 3], [4, 5]];
     * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
     * // => [4, 5, 2, 3, 0, 1]
     */
    function reduceRight(collection, callback, accumulator, thisArg) {
      var noaccum = arguments.length < 3;
      callback = lodash.createCallback(callback, thisArg, 4);
      forEachRight(collection, function(value, index, collection) {
        accumulator = noaccum
          ? (noaccum = false, value)
          : callback(accumulator, value, index, collection);
      });
      return accumulator;
    }

    /**
     * The opposite of `_.filter` this method returns the elements of a
     * collection that the callback does **not** return truey for.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of elements that failed the callback check.
     * @example
     *
     * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
     * // => [1, 3, 5]
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.reject(characters, 'blocked');
     * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
     *
     * // using "_.where" callback shorthand
     * _.reject(characters, { 'age': 36 });
     * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
     */
    function reject(collection, callback, thisArg) {
      callback = lodash.createCallback(callback, thisArg, 3);
      return filter(collection, function(value, index, collection) {
        return !callback(value, index, collection);
      });
    }

    /**
     * Retrieves a random element or `n` random elements from a collection.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to sample.
     * @param {number} [n] The number of elements to sample.
     * @param- {Object} [guard] Allows working with functions like `_.map`
     *  without using their `index` arguments as `n`.
     * @returns {Array} Returns the random sample(s) of `collection`.
     * @example
     *
     * _.sample([1, 2, 3, 4]);
     * // => 2
     *
     * _.sample([1, 2, 3, 4], 2);
     * // => [3, 1]
     */
    function sample(collection, n, guard) {
      if (collection && typeof collection.length != 'number') {
        collection = values(collection);
      }
      if (n == null || guard) {
        return collection ? collection[baseRandom(0, collection.length - 1)] : undefined;
      }
      var result = shuffle(collection);
      result.length = nativeMin(nativeMax(0, n), result.length);
      return result;
    }

    /**
     * Creates an array of shuffled values, using a version of the Fisher-Yates
     * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to shuffle.
     * @returns {Array} Returns a new shuffled collection.
     * @example
     *
     * _.shuffle([1, 2, 3, 4, 5, 6]);
     * // => [4, 1, 6, 3, 5, 2]
     */
    function shuffle(collection) {
      var index = -1,
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      forEach(collection, function(value) {
        var rand = baseRandom(0, ++index);
        result[index] = result[rand];
        result[rand] = value;
      });
      return result;
    }

    /**
     * Gets the size of the `collection` by returning `collection.length` for arrays
     * and array-like objects or the number of own enumerable properties for objects.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to inspect.
     * @returns {number} Returns `collection.length` or number of own enumerable properties.
     * @example
     *
     * _.size([1, 2]);
     * // => 2
     *
     * _.size({ 'one': 1, 'two': 2, 'three': 3 });
     * // => 3
     *
     * _.size('pebbles');
     * // => 7
     */
    function size(collection) {
      var length = collection ? collection.length : 0;
      return typeof length == 'number' ? length : keys(collection).length;
    }

    /**
     * Checks if the callback returns a truey value for **any** element of a
     * collection. The function returns as soon as it finds a passing value and
     * does not iterate over the entire collection. The callback is bound to
     * `thisArg` and invoked with three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias any
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {boolean} Returns `true` if any element passed the callback check,
     *  else `false`.
     * @example
     *
     * _.some([null, 0, 'yes', false], Boolean);
     * // => true
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'blocked': false },
     *   { 'name': 'fred',   'age': 40, 'blocked': true }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.some(characters, 'blocked');
     * // => true
     *
     * // using "_.where" callback shorthand
     * _.some(characters, { 'age': 1 });
     * // => false
     */
    function some(collection, callback, thisArg) {
      var result;
      callback = lodash.createCallback(callback, thisArg, 3);

      var index = -1,
          length = collection ? collection.length : 0;

      if (typeof length == 'number') {
        while (++index < length) {
          if ((result = callback(collection[index], index, collection))) {
            break;
          }
        }
      } else {
        forOwn(collection, function(value, index, collection) {
          return !(result = callback(value, index, collection));
        });
      }
      return !!result;
    }

    /**
     * Creates an array of elements, sorted in ascending order by the results of
     * running each element in a collection through the callback. This method
     * performs a stable sort, that is, it will preserve the original sort order
     * of equal elements. The callback is bound to `thisArg` and invoked with
     * three arguments; (value, index|key, collection).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an array of property names is provided for `callback` the collection
     * will be sorted by each property value.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Array|Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of sorted elements.
     * @example
     *
     * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
     * // => [3, 1, 2]
     *
     * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
     * // => [3, 1, 2]
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36 },
     *   { 'name': 'fred',    'age': 40 },
     *   { 'name': 'barney',  'age': 26 },
     *   { 'name': 'fred',    'age': 30 }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.map(_.sortBy(characters, 'age'), _.values);
     * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]]
     *
     * // sorting by multiple properties
     * _.map(_.sortBy(characters, ['name', 'age']), _.values);
     * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
     */
    function sortBy(collection, callback, thisArg) {
      var index = -1,
          isArr = isArray(callback),
          length = collection ? collection.length : 0,
          result = Array(typeof length == 'number' ? length : 0);

      if (!isArr) {
        callback = lodash.createCallback(callback, thisArg, 3);
      }
      forEach(collection, function(value, key, collection) {
        var object = result[++index] = getObject();
        if (isArr) {
          object.criteria = map(callback, function(key) { return value[key]; });
        } else {
          (object.criteria = getArray())[0] = callback(value, key, collection);
        }
        object.index = index;
        object.value = value;
      });

      length = result.length;
      result.sort(compareAscending);
      while (length--) {
        var object = result[length];
        result[length] = object.value;
        if (!isArr) {
          releaseArray(object.criteria);
        }
        releaseObject(object);
      }
      return result;
    }

    /**
     * Converts the `collection` to an array.
     *
     * @static
     * @memberOf _
     * @category Collections
     * @param {Array|Object|string} collection The collection to convert.
     * @returns {Array} Returns the new converted array.
     * @example
     *
     * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
     * // => [2, 3, 4]
     */
    function toArray(collection) {
      if (collection && typeof collection.length == 'number') {
        return slice(collection);
      }
      return values(collection);
    }

    /**
     * Performs a deep comparison of each element in a `collection` to the given
     * `properties` object, returning an array of all elements that have equivalent
     * property values.
     *
     * @static
     * @memberOf _
     * @type Function
     * @category Collections
     * @param {Array|Object|string} collection The collection to iterate over.
     * @param {Object} props The object of property values to filter by.
     * @returns {Array} Returns a new array of elements that have the given properties.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] },
     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
     * ];
     *
     * _.where(characters, { 'age': 36 });
     * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }]
     *
     * _.where(characters, { 'pets': ['dino'] });
     * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }]
     */
    var where = filter;

    /*--------------------------------------------------------------------------*/

    /**
     * Creates an array with all falsey values removed. The values `false`, `null`,
     * `0`, `""`, `undefined`, and `NaN` are all falsey.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to compact.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.compact([0, 1, false, 2, '', 3]);
     * // => [1, 2, 3]
     */
    function compact(array) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      while (++index < length) {
        var value = array[index];
        if (value) {
          result.push(value);
        }
      }
      return result;
    }

    /**
     * Creates an array excluding all values of the provided arrays using strict
     * equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {...Array} [values] The arrays of values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
     * // => [1, 3, 4]
     */
    function difference(array) {
      return baseDifference(array, baseFlatten(arguments, true, true, 1));
    }

    /**
     * This method is like `_.find` except that it returns the index of the first
     * element that passes the callback check, instead of the element itself.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': false },
     *   { 'name': 'fred',    'age': 40, 'blocked': true },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': false }
     * ];
     *
     * _.findIndex(characters, function(chr) {
     *   return chr.age < 20;
     * });
     * // => 2
     *
     * // using "_.where" callback shorthand
     * _.findIndex(characters, { 'age': 36 });
     * // => 0
     *
     * // using "_.pluck" callback shorthand
     * _.findIndex(characters, 'blocked');
     * // => 1
     */
    function findIndex(array, callback, thisArg) {
      var index = -1,
          length = array ? array.length : 0;

      callback = lodash.createCallback(callback, thisArg, 3);
      while (++index < length) {
        if (callback(array[index], index, array)) {
          return index;
        }
      }
      return -1;
    }

    /**
     * This method is like `_.findIndex` except that it iterates over elements
     * of a `collection` from right to left.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index of the found element, else `-1`.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36, 'blocked': true },
     *   { 'name': 'fred',    'age': 40, 'blocked': false },
     *   { 'name': 'pebbles', 'age': 1,  'blocked': true }
     * ];
     *
     * _.findLastIndex(characters, function(chr) {
     *   return chr.age > 30;
     * });
     * // => 1
     *
     * // using "_.where" callback shorthand
     * _.findLastIndex(characters, { 'age': 36 });
     * // => 0
     *
     * // using "_.pluck" callback shorthand
     * _.findLastIndex(characters, 'blocked');
     * // => 2
     */
    function findLastIndex(array, callback, thisArg) {
      var length = array ? array.length : 0;
      callback = lodash.createCallback(callback, thisArg, 3);
      while (length--) {
        if (callback(array[length], length, array)) {
          return length;
        }
      }
      return -1;
    }

    /**
     * Gets the first element or first `n` elements of an array. If a callback
     * is provided elements at the beginning of the array are returned as long
     * as the callback returns truey. The callback is bound to `thisArg` and
     * invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias head, take
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the first element(s) of `array`.
     * @example
     *
     * _.first([1, 2, 3]);
     * // => 1
     *
     * _.first([1, 2, 3], 2);
     * // => [1, 2]
     *
     * _.first([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [1, 2]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': false, 'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.first(characters, 'blocked');
     * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }]
     *
     * // using "_.where" callback shorthand
     * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name');
     * // => ['barney', 'fred']
     */
    function first(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = -1;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (++index < length && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = callback;
        if (n == null || thisArg) {
          return array ? array[0] : undefined;
        }
      }
      return slice(array, 0, nativeMin(nativeMax(0, n), length));
    }

    /**
     * Flattens a nested array (the nesting can be to any depth). If `isShallow`
     * is truey, the array will only be flattened a single level. If a callback
     * is provided each element of the array is passed through the callback before
     * flattening. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to flatten.
     * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new flattened array.
     * @example
     *
     * _.flatten([1, [2], [3, [[4]]]]);
     * // => [1, 2, 3, 4];
     *
     * _.flatten([1, [2], [3, [[4]]]], true);
     * // => [1, 2, 3, [[4]]];
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] },
     *   { 'name': 'fred',   'age': 40, 'pets': ['baby puss', 'dino'] }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.flatten(characters, 'pets');
     * // => ['hoppy', 'baby puss', 'dino']
     */
    function flatten(array, isShallow, callback, thisArg) {
      // juggle arguments
      if (typeof isShallow != 'boolean' && isShallow != null) {
        thisArg = callback;
        callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
        isShallow = false;
      }
      if (callback != null) {
        array = map(array, callback, thisArg);
      }
      return baseFlatten(array, isShallow);
    }

    /**
     * Gets the index at which the first occurrence of `value` is found using
     * strict equality for comparisons, i.e. `===`. If the array is already sorted
     * providing `true` for `fromIndex` will run a faster binary search.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {boolean|number} [fromIndex=0] The index to search from or `true`
     *  to perform a binary search on a sorted array.
     * @returns {number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 1
     *
     * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 4
     *
     * _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
     * // => 2
     */
    function indexOf(array, value, fromIndex) {
      if (typeof fromIndex == 'number') {
        var length = array ? array.length : 0;
        fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0);
      } else if (fromIndex) {
        var index = sortedIndex(array, value);
        return array[index] === value ? index : -1;
      }
      return baseIndexOf(array, value, fromIndex);
    }

    /**
     * Gets all but the last element or last `n` elements of an array. If a
     * callback is provided elements at the end of the array are excluded from
     * the result as long as the callback returns truey. The callback is bound
     * to `thisArg` and invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.initial([1, 2, 3]);
     * // => [1, 2]
     *
     * _.initial([1, 2, 3], 2);
     * // => [1]
     *
     * _.initial([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [1]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.initial(characters, 'blocked');
     * // => [{ 'name': 'barney',  'blocked': false, 'employer': 'slate' }]
     *
     * // using "_.where" callback shorthand
     * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name');
     * // => ['barney', 'fred']
     */
    function initial(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = length;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (index-- && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : callback || n;
      }
      return slice(array, 0, nativeMin(nativeMax(0, length - n), length));
    }

    /**
     * Creates an array of unique values present in all provided arrays using
     * strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of shared values.
     * @example
     *
     * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
     * // => [1, 2]
     */
    function intersection() {
      var args = [],
          argsIndex = -1,
          argsLength = arguments.length,
          caches = getArray(),
          indexOf = getIndexOf(),
          trustIndexOf = indexOf === baseIndexOf,
          seen = getArray();

      while (++argsIndex < argsLength) {
        var value = arguments[argsIndex];
        if (isArray(value) || isArguments(value)) {
          args.push(value);
          caches.push(trustIndexOf && value.length >= largeArraySize &&
            createCache(argsIndex ? args[argsIndex] : seen));
        }
      }
      var array = args[0],
          index = -1,
          length = array ? array.length : 0,
          result = [];

      outer:
      while (++index < length) {
        var cache = caches[0];
        value = array[index];

        if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
          argsIndex = argsLength;
          (cache || seen).push(value);
          while (--argsIndex) {
            cache = caches[argsIndex];
            if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
              continue outer;
            }
          }
          result.push(value);
        }
      }
      while (argsLength--) {
        cache = caches[argsLength];
        if (cache) {
          releaseObject(cache);
        }
      }
      releaseArray(caches);
      releaseArray(seen);
      return result;
    }

    /**
     * Gets the last element or last `n` elements of an array. If a callback is
     * provided elements at the end of the array are returned as long as the
     * callback returns truey. The callback is bound to `thisArg` and invoked
     * with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback] The function called
     *  per element or the number of elements to return. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {*} Returns the last element(s) of `array`.
     * @example
     *
     * _.last([1, 2, 3]);
     * // => 3
     *
     * _.last([1, 2, 3], 2);
     * // => [2, 3]
     *
     * _.last([1, 2, 3], function(num) {
     *   return num > 1;
     * });
     * // => [2, 3]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': false, 'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': true,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true,  'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.pluck(_.last(characters, 'blocked'), 'name');
     * // => ['fred', 'pebbles']
     *
     * // using "_.where" callback shorthand
     * _.last(characters, { 'employer': 'na' });
     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
     */
    function last(array, callback, thisArg) {
      var n = 0,
          length = array ? array.length : 0;

      if (typeof callback != 'number' && callback != null) {
        var index = length;
        callback = lodash.createCallback(callback, thisArg, 3);
        while (index-- && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = callback;
        if (n == null || thisArg) {
          return array ? array[length - 1] : undefined;
        }
      }
      return slice(array, nativeMax(0, length - n));
    }

    /**
     * Gets the index at which the last occurrence of `value` is found using strict
     * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
     * as the offset from the end of the collection.
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to search.
     * @param {*} value The value to search for.
     * @param {number} [fromIndex=array.length-1] The index to search from.
     * @returns {number} Returns the index of the matched value or `-1`.
     * @example
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
     * // => 4
     *
     * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
     * // => 1
     */
    function lastIndexOf(array, value, fromIndex) {
      var index = array ? array.length : 0;
      if (typeof fromIndex == 'number') {
        index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
      }
      while (index--) {
        if (array[index] === value) {
          return index;
        }
      }
      return -1;
    }

    /**
     * Removes all provided values from the given array using strict equality for
     * comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to modify.
     * @param {...*} [value] The values to remove.
     * @returns {Array} Returns `array`.
     * @example
     *
     * var array = [1, 2, 3, 1, 2, 3];
     * _.pull(array, 2, 3);
     * console.log(array);
     * // => [1, 1]
     */
    function pull(array) {
      var args = arguments,
          argsIndex = 0,
          argsLength = args.length,
          length = array ? array.length : 0;

      while (++argsIndex < argsLength) {
        var index = -1,
            value = args[argsIndex];
        while (++index < length) {
          if (array[index] === value) {
            splice.call(array, index--, 1);
            length--;
          }
        }
      }
      return array;
    }

    /**
     * Creates an array of numbers (positive and/or negative) progressing from
     * `start` up to but not including `end`. If `start` is less than `stop` a
     * zero-length range is created unless a negative `step` is specified.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {number} [start=0] The start of the range.
     * @param {number} end The end of the range.
     * @param {number} [step=1] The value to increment or decrement by.
     * @returns {Array} Returns a new range array.
     * @example
     *
     * _.range(4);
     * // => [0, 1, 2, 3]
     *
     * _.range(1, 5);
     * // => [1, 2, 3, 4]
     *
     * _.range(0, 20, 5);
     * // => [0, 5, 10, 15]
     *
     * _.range(0, -4, -1);
     * // => [0, -1, -2, -3]
     *
     * _.range(1, 4, 0);
     * // => [1, 1, 1]
     *
     * _.range(0);
     * // => []
     */
    function range(start, end, step) {
      start = +start || 0;
      step = typeof step == 'number' ? step : (+step || 1);

      if (end == null) {
        end = start;
        start = 0;
      }
      // use `Array(length)` so engines like Chakra and V8 avoid slower modes
      // http://youtu.be/XAqIpGU8ZZk#t=17m25s
      var index = -1,
          length = nativeMax(0, ceil((end - start) / (step || 1))),
          result = Array(length);

      while (++index < length) {
        result[index] = start;
        start += step;
      }
      return result;
    }

    /**
     * Removes all elements from an array that the callback returns truey for
     * and returns an array of removed elements. The callback is bound to `thisArg`
     * and invoked with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to modify.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a new array of removed elements.
     * @example
     *
     * var array = [1, 2, 3, 4, 5, 6];
     * var evens = _.remove(array, function(num) { return num % 2 == 0; });
     *
     * console.log(array);
     * // => [1, 3, 5]
     *
     * console.log(evens);
     * // => [2, 4, 6]
     */
    function remove(array, callback, thisArg) {
      var index = -1,
          length = array ? array.length : 0,
          result = [];

      callback = lodash.createCallback(callback, thisArg, 3);
      while (++index < length) {
        var value = array[index];
        if (callback(value, index, array)) {
          result.push(value);
          splice.call(array, index--, 1);
          length--;
        }
      }
      return result;
    }

    /**
     * The opposite of `_.initial` this method gets all but the first element or
     * first `n` elements of an array. If a callback function is provided elements
     * at the beginning of the array are excluded from the result as long as the
     * callback returns truey. The callback is bound to `thisArg` and invoked
     * with three arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias drop, tail
     * @category Arrays
     * @param {Array} array The array to query.
     * @param {Function|Object|number|string} [callback=1] The function called
     *  per element or the number of elements to exclude. If a property name or
     *  object is provided it will be used to create a "_.pluck" or "_.where"
     *  style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a slice of `array`.
     * @example
     *
     * _.rest([1, 2, 3]);
     * // => [2, 3]
     *
     * _.rest([1, 2, 3], 2);
     * // => [3]
     *
     * _.rest([1, 2, 3], function(num) {
     *   return num < 3;
     * });
     * // => [3]
     *
     * var characters = [
     *   { 'name': 'barney',  'blocked': true,  'employer': 'slate' },
     *   { 'name': 'fred',    'blocked': false,  'employer': 'slate' },
     *   { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
     * ];
     *
     * // using "_.pluck" callback shorthand
     * _.pluck(_.rest(characters, 'blocked'), 'name');
     * // => ['fred', 'pebbles']
     *
     * // using "_.where" callback shorthand
     * _.rest(characters, { 'employer': 'slate' });
     * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
     */
    function rest(array, callback, thisArg) {
      if (typeof callback != 'number' && callback != null) {
        var n = 0,
            index = -1,
            length = array ? array.length : 0;

        callback = lodash.createCallback(callback, thisArg, 3);
        while (++index < length && callback(array[index], index, array)) {
          n++;
        }
      } else {
        n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
      }
      return slice(array, n);
    }

    /**
     * Uses a binary search to determine the smallest index at which a value
     * should be inserted into a given sorted array in order to maintain the sort
     * order of the array. If a callback is provided it will be executed for
     * `value` and each element of `array` to compute their sort ranking. The
     * callback is bound to `thisArg` and invoked with one argument; (value).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to inspect.
     * @param {*} value The value to evaluate.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {number} Returns the index at which `value` should be inserted
     *  into `array`.
     * @example
     *
     * _.sortedIndex([20, 30, 50], 40);
     * // => 2
     *
     * // using "_.pluck" callback shorthand
     * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
     * // => 2
     *
     * var dict = {
     *   'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
     * };
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return dict.wordToNumber[word];
     * });
     * // => 2
     *
     * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
     *   return this.wordToNumber[word];
     * }, dict);
     * // => 2
     */
    function sortedIndex(array, value, callback, thisArg) {
      var low = 0,
          high = array ? array.length : low;

      // explicitly reference `identity` for better inlining in Firefox
      callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity;
      value = callback(value);

      while (low < high) {
        var mid = (low + high) >>> 1;
        (callback(array[mid]) < value)
          ? low = mid + 1
          : high = mid;
      }
      return low;
    }

    /**
     * Creates an array of unique values, in order, of the provided arrays using
     * strict equality for comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of combined values.
     * @example
     *
     * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
     * // => [1, 2, 3, 5, 4]
     */
    function union() {
      return baseUniq(baseFlatten(arguments, true, true));
    }

    /**
     * Creates a duplicate-value-free version of an array using strict equality
     * for comparisons, i.e. `===`. If the array is sorted, providing
     * `true` for `isSorted` will use a faster algorithm. If a callback is provided
     * each element of `array` is passed through the callback before uniqueness
     * is computed. The callback is bound to `thisArg` and invoked with three
     * arguments; (value, index, array).
     *
     * If a property name is provided for `callback` the created "_.pluck" style
     * callback will return the property value of the given element.
     *
     * If an object is provided for `callback` the created "_.where" style callback
     * will return `true` for elements that have the properties of the given object,
     * else `false`.
     *
     * @static
     * @memberOf _
     * @alias unique
     * @category Arrays
     * @param {Array} array The array to process.
     * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
     * @param {Function|Object|string} [callback=identity] The function called
     *  per iteration. If a property name or object is provided it will be used
     *  to create a "_.pluck" or "_.where" style callback, respectively.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns a duplicate-value-free array.
     * @example
     *
     * _.uniq([1, 2, 1, 3, 1]);
     * // => [1, 2, 3]
     *
     * _.uniq([1, 1, 2, 2, 3], true);
     * // => [1, 2, 3]
     *
     * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); });
     * // => ['A', 'b', 'C']
     *
     * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math);
     * // => [1, 2.5, 3]
     *
     * // using "_.pluck" callback shorthand
     * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
     * // => [{ 'x': 1 }, { 'x': 2 }]
     */
    function uniq(array, isSorted, callback, thisArg) {
      // juggle arguments
      if (typeof isSorted != 'boolean' && isSorted != null) {
        thisArg = callback;
        callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
        isSorted = false;
      }
      if (callback != null) {
        callback = lodash.createCallback(callback, thisArg, 3);
      }
      return baseUniq(array, isSorted, callback);
    }

    /**
     * Creates an array excluding all provided values using strict equality for
     * comparisons, i.e. `===`.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {Array} array The array to filter.
     * @param {...*} [value] The values to exclude.
     * @returns {Array} Returns a new array of filtered values.
     * @example
     *
     * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
     * // => [2, 3, 4]
     */
    function without(array) {
      return baseDifference(array, slice(arguments, 1));
    }

    /**
     * Creates an array that is the symmetric difference of the provided arrays.
     * See http://en.wikipedia.org/wiki/Symmetric_difference.
     *
     * @static
     * @memberOf _
     * @category Arrays
     * @param {...Array} [array] The arrays to inspect.
     * @returns {Array} Returns an array of values.
     * @example
     *
     * _.xor([1, 2, 3], [5, 2, 1, 4]);
     * // => [3, 5, 4]
     *
     * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]);
     * // => [1, 4, 5]
     */
    function xor() {
      var index = -1,
          length = arguments.length;

      while (++index < length) {
        var array = arguments[index];
        if (isArray(array) || isArguments(array)) {
          var result = result
            ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result)))
            : array;
        }
      }
      return result || [];
    }

    /**
     * Creates an array of grouped elements, the first of which contains the first
     * elements of the given arrays, the second of which contains the second
     * elements of the given arrays, and so on.
     *
     * @static
     * @memberOf _
     * @alias unzip
     * @category Arrays
     * @param {...Array} [array] Arrays to process.
     * @returns {Array} Returns a new array of grouped elements.
     * @example
     *
     * _.zip(['fred', 'barney'], [30, 40], [true, false]);
     * // => [['fred', 30, true], ['barney', 40, false]]
     */
    function zip() {
      var array = arguments.length > 1 ? arguments : arguments[0],
          index = -1,
          length = array ? max(pluck(array, 'length')) : 0,
          result = Array(length < 0 ? 0 : length);

      while (++index < length) {
        result[index] = pluck(array, index);
      }
      return result;
    }

    /**
     * Creates an object composed from arrays of `keys` and `values`. Provide
     * either a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`
     * or two arrays, one of `keys` and one of corresponding `values`.
     *
     * @static
     * @memberOf _
     * @alias object
     * @category Arrays
     * @param {Array} keys The array of keys.
     * @param {Array} [values=[]] The array of values.
     * @returns {Object} Returns an object composed of the given keys and
     *  corresponding values.
     * @example
     *
     * _.zipObject(['fred', 'barney'], [30, 40]);
     * // => { 'fred': 30, 'barney': 40 }
     */
    function zipObject(keys, values) {
      var index = -1,
          length = keys ? keys.length : 0,
          result = {};

      if (!values && length && !isArray(keys[0])) {
        values = [];
      }
      while (++index < length) {
        var key = keys[index];
        if (values) {
          result[key] = values[index];
        } else if (key) {
          result[key[0]] = key[1];
        }
      }
      return result;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a function that executes `func`, with  the `this` binding and
     * arguments of the created function, only after being called `n` times.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {number} n The number of times the function must be called before
     *  `func` is executed.
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var saves = ['profile', 'settings'];
     *
     * var done = _.after(saves.length, function() {
     *   console.log('Done saving!');
     * });
     *
     * _.forEach(saves, function(type) {
     *   asyncSave({ 'type': type, 'complete': done });
     * });
     * // => logs 'Done saving!', after all saves have completed
     */
    function after(n, func) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      return function() {
        if (--n < 1) {
          return func.apply(this, arguments);
        }
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with the `this`
     * binding of `thisArg` and prepends any additional `bind` arguments to those
     * provided to the bound function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to bind.
     * @param {*} [thisArg] The `this` binding of `func`.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var func = function(greeting) {
     *   return greeting + ' ' + this.name;
     * };
     *
     * func = _.bind(func, { 'name': 'fred' }, 'hi');
     * func();
     * // => 'hi fred'
     */
    function bind(func, thisArg) {
      return arguments.length > 2
        ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
        : createWrapper(func, 1, null, null, thisArg);
    }

    /**
     * Binds methods of an object to the object itself, overwriting the existing
     * method. Method names may be specified as individual arguments or as arrays
     * of method names. If no method names are provided all the function properties
     * of `object` will be bound.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object to bind and assign the bound methods to.
     * @param {...string} [methodName] The object method names to
     *  bind, specified as individual method names or arrays of method names.
     * @returns {Object} Returns `object`.
     * @example
     *
     * var view = {
     *   'label': 'docs',
     *   'onClick': function() { console.log('clicked ' + this.label); }
     * };
     *
     * _.bindAll(view);
     * jQuery('#docs').on('click', view.onClick);
     * // => logs 'clicked docs', when the button is clicked
     */
    function bindAll(object) {
      var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object),
          index = -1,
          length = funcs.length;

      while (++index < length) {
        var key = funcs[index];
        object[key] = createWrapper(object[key], 1, null, null, object);
      }
      return object;
    }

    /**
     * Creates a function that, when called, invokes the method at `object[key]`
     * and prepends any additional `bindKey` arguments to those provided to the bound
     * function. This method differs from `_.bind` by allowing bound functions to
     * reference methods that will be redefined or don't yet exist.
     * See http://michaux.ca/articles/lazy-function-definition-pattern.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Object} object The object the method belongs to.
     * @param {string} key The key of the method.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new bound function.
     * @example
     *
     * var object = {
     *   'name': 'fred',
     *   'greet': function(greeting) {
     *     return greeting + ' ' + this.name;
     *   }
     * };
     *
     * var func = _.bindKey(object, 'greet', 'hi');
     * func();
     * // => 'hi fred'
     *
     * object.greet = function(greeting) {
     *   return greeting + 'ya ' + this.name + '!';
     * };
     *
     * func();
     * // => 'hiya fred!'
     */
    function bindKey(object, key) {
      return arguments.length > 2
        ? createWrapper(key, 19, slice(arguments, 2), null, object)
        : createWrapper(key, 3, null, null, object);
    }

    /**
     * Creates a function that is the composition of the provided functions,
     * where each function consumes the return value of the function that follows.
     * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
     * Each function is executed with the `this` binding of the composed function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {...Function} [func] Functions to compose.
     * @returns {Function} Returns the new composed function.
     * @example
     *
     * var realNameMap = {
     *   'pebbles': 'penelope'
     * };
     *
     * var format = function(name) {
     *   name = realNameMap[name.toLowerCase()] || name;
     *   return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase();
     * };
     *
     * var greet = function(formatted) {
     *   return 'Hiya ' + formatted + '!';
     * };
     *
     * var welcome = _.compose(greet, format);
     * welcome('pebbles');
     * // => 'Hiya Penelope!'
     */
    function compose() {
      var funcs = arguments,
          length = funcs.length;

      while (length--) {
        if (!isFunction(funcs[length])) {
          throw new TypeError;
        }
      }
      return function() {
        var args = arguments,
            length = funcs.length;

        while (length--) {
          args = [funcs[length].apply(this, args)];
        }
        return args[0];
      };
    }

    /**
     * Creates a function which accepts one or more arguments of `func` that when
     * invoked either executes `func` returning its result, if all `func` arguments
     * have been provided, or returns a function that accepts one or more of the
     * remaining `func` arguments, and so on. The arity of `func` can be specified
     * if `func.length` is not sufficient.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to curry.
     * @param {number} [arity=func.length] The arity of `func`.
     * @returns {Function} Returns the new curried function.
     * @example
     *
     * var curried = _.curry(function(a, b, c) {
     *   console.log(a + b + c);
     * });
     *
     * curried(1)(2)(3);
     * // => 6
     *
     * curried(1, 2)(3);
     * // => 6
     *
     * curried(1, 2, 3);
     * // => 6
     */
    function curry(func, arity) {
      arity = typeof arity == 'number' ? arity : (+arity || func.length);
      return createWrapper(func, 4, null, null, null, arity);
    }

    /**
     * Creates a function that will delay the execution of `func` until after
     * `wait` milliseconds have elapsed since the last time it was invoked.
     * Provide an options object to indicate that `func` should be invoked on
     * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
     * to the debounced function will return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true` `func` will be called
     * on the trailing edge of the timeout only if the the debounced function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to debounce.
     * @param {number} wait The number of milliseconds to delay.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout.
     * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called.
     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new debounced function.
     * @example
     *
     * // avoid costly calculations while the window size is in flux
     * var lazyLayout = _.debounce(calculateLayout, 150);
     * jQuery(window).on('resize', lazyLayout);
     *
     * // execute `sendMail` when the click event is fired, debouncing subsequent calls
     * jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
     *   'leading': true,
     *   'trailing': false
     * });
     *
     * // ensure `batchLog` is executed once after 1 second of debounced calls
     * var source = new EventSource('/stream');
     * source.addEventListener('message', _.debounce(batchLog, 250, {
     *   'maxWait': 1000
     * }, false);
     */
    function debounce(func, wait, options) {
      var args,
          maxTimeoutId,
          result,
          stamp,
          thisArg,
          timeoutId,
          trailingCall,
          lastCalled = 0,
          maxWait = false,
          trailing = true;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      wait = nativeMax(0, wait) || 0;
      if (options === true) {
        var leading = true;
        trailing = false;
      } else if (isObject(options)) {
        leading = options.leading;
        maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0);
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      var delayed = function() {
        var remaining = wait - (now() - stamp);
        if (remaining <= 0) {
          if (maxTimeoutId) {
            clearTimeout(maxTimeoutId);
          }
          var isCalled = trailingCall;
          maxTimeoutId = timeoutId = trailingCall = undefined;
          if (isCalled) {
            lastCalled = now();
            result = func.apply(thisArg, args);
            if (!timeoutId && !maxTimeoutId) {
              args = thisArg = null;
            }
          }
        } else {
          timeoutId = setTimeout(delayed, remaining);
        }
      };

      var maxDelayed = function() {
        if (timeoutId) {
          clearTimeout(timeoutId);
        }
        maxTimeoutId = timeoutId = trailingCall = undefined;
        if (trailing || (maxWait !== wait)) {
          lastCalled = now();
          result = func.apply(thisArg, args);
          if (!timeoutId && !maxTimeoutId) {
            args = thisArg = null;
          }
        }
      };

      return function() {
        args = arguments;
        stamp = now();
        thisArg = this;
        trailingCall = trailing && (timeoutId || !leading);

        if (maxWait === false) {
          var leadingCall = leading && !timeoutId;
        } else {
          if (!maxTimeoutId && !leading) {
            lastCalled = stamp;
          }
          var remaining = maxWait - (stamp - lastCalled),
              isCalled = remaining <= 0;

          if (isCalled) {
            if (maxTimeoutId) {
              maxTimeoutId = clearTimeout(maxTimeoutId);
            }
            lastCalled = stamp;
            result = func.apply(thisArg, args);
          }
          else if (!maxTimeoutId) {
            maxTimeoutId = setTimeout(maxDelayed, remaining);
          }
        }
        if (isCalled && timeoutId) {
          timeoutId = clearTimeout(timeoutId);
        }
        else if (!timeoutId && wait !== maxWait) {
          timeoutId = setTimeout(delayed, wait);
        }
        if (leadingCall) {
          isCalled = true;
          result = func.apply(thisArg, args);
        }
        if (isCalled && !timeoutId && !maxTimeoutId) {
          args = thisArg = null;
        }
        return result;
      };
    }

    /**
     * Defers executing the `func` function until the current call stack has cleared.
     * Additional arguments will be provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to defer.
     * @param {...*} [arg] Arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.defer(function(text) { console.log(text); }, 'deferred');
     * // logs 'deferred' after one or more milliseconds
     */
    function defer(func) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var args = slice(arguments, 1);
      return setTimeout(function() { func.apply(undefined, args); }, 1);
    }

    /**
     * Executes the `func` function after `wait` milliseconds. Additional arguments
     * will be provided to `func` when it is invoked.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to delay.
     * @param {number} wait The number of milliseconds to delay execution.
     * @param {...*} [arg] Arguments to invoke the function with.
     * @returns {number} Returns the timer id.
     * @example
     *
     * _.delay(function(text) { console.log(text); }, 1000, 'later');
     * // => logs 'later' after one second
     */
    function delay(func, wait) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var args = slice(arguments, 2);
      return setTimeout(function() { func.apply(undefined, args); }, wait);
    }

    /**
     * Creates a function that memoizes the result of `func`. If `resolver` is
     * provided it will be used to determine the cache key for storing the result
     * based on the arguments provided to the memoized function. By default, the
     * first argument provided to the memoized function is used as the cache key.
     * The `func` is executed with the `this` binding of the memoized function.
     * The result cache is exposed as the `cache` property on the memoized function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to have its output memoized.
     * @param {Function} [resolver] A function used to resolve the cache key.
     * @returns {Function} Returns the new memoizing function.
     * @example
     *
     * var fibonacci = _.memoize(function(n) {
     *   return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
     * });
     *
     * fibonacci(9)
     * // => 34
     *
     * var data = {
     *   'fred': { 'name': 'fred', 'age': 40 },
     *   'pebbles': { 'name': 'pebbles', 'age': 1 }
     * };
     *
     * // modifying the result cache
     * var get = _.memoize(function(name) { return data[name]; }, _.identity);
     * get('pebbles');
     * // => { 'name': 'pebbles', 'age': 1 }
     *
     * get.cache.pebbles.name = 'penelope';
     * get('pebbles');
     * // => { 'name': 'penelope', 'age': 1 }
     */
    function memoize(func, resolver) {
      if (!isFunction(func)) {
        throw new TypeError;
      }
      var memoized = function() {
        var cache = memoized.cache,
            key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0];

        return hasOwnProperty.call(cache, key)
          ? cache[key]
          : (cache[key] = func.apply(this, arguments));
      }
      memoized.cache = {};
      return memoized;
    }

    /**
     * Creates a function that is restricted to execute `func` once. Repeat calls to
     * the function will return the value of the first call. The `func` is executed
     * with the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to restrict.
     * @returns {Function} Returns the new restricted function.
     * @example
     *
     * var initialize = _.once(createApplication);
     * initialize();
     * initialize();
     * // `initialize` executes `createApplication` once
     */
    function once(func) {
      var ran,
          result;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      return function() {
        if (ran) {
          return result;
        }
        ran = true;
        result = func.apply(this, arguments);

        // clear the `func` variable so the function may be garbage collected
        func = null;
        return result;
      };
    }

    /**
     * Creates a function that, when called, invokes `func` with any additional
     * `partial` arguments prepended to those provided to the new function. This
     * method is similar to `_.bind` except it does **not** alter the `this` binding.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var greet = function(greeting, name) { return greeting + ' ' + name; };
     * var hi = _.partial(greet, 'hi');
     * hi('fred');
     * // => 'hi fred'
     */
    function partial(func) {
      return createWrapper(func, 16, slice(arguments, 1));
    }

    /**
     * This method is like `_.partial` except that `partial` arguments are
     * appended to those provided to the new function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to partially apply arguments to.
     * @param {...*} [arg] Arguments to be partially applied.
     * @returns {Function} Returns the new partially applied function.
     * @example
     *
     * var defaultsDeep = _.partialRight(_.merge, _.defaults);
     *
     * var options = {
     *   'variable': 'data',
     *   'imports': { 'jq': $ }
     * };
     *
     * defaultsDeep(options, _.templateSettings);
     *
     * options.variable
     * // => 'data'
     *
     * options.imports
     * // => { '_': _, 'jq': $ }
     */
    function partialRight(func) {
      return createWrapper(func, 32, null, slice(arguments, 1));
    }

    /**
     * Creates a function that, when executed, will only call the `func` function
     * at most once per every `wait` milliseconds. Provide an options object to
     * indicate that `func` should be invoked on the leading and/or trailing edge
     * of the `wait` timeout. Subsequent calls to the throttled function will
     * return the result of the last `func` call.
     *
     * Note: If `leading` and `trailing` options are `true` `func` will be called
     * on the trailing edge of the timeout only if the the throttled function is
     * invoked more than once during the `wait` timeout.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {Function} func The function to throttle.
     * @param {number} wait The number of milliseconds to throttle executions to.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout.
     * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
     * @returns {Function} Returns the new throttled function.
     * @example
     *
     * // avoid excessively updating the position while scrolling
     * var throttled = _.throttle(updatePosition, 100);
     * jQuery(window).on('scroll', throttled);
     *
     * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes
     * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
     *   'trailing': false
     * }));
     */
    function throttle(func, wait, options) {
      var leading = true,
          trailing = true;

      if (!isFunction(func)) {
        throw new TypeError;
      }
      if (options === false) {
        leading = false;
      } else if (isObject(options)) {
        leading = 'leading' in options ? options.leading : leading;
        trailing = 'trailing' in options ? options.trailing : trailing;
      }
      debounceOptions.leading = leading;
      debounceOptions.maxWait = wait;
      debounceOptions.trailing = trailing;

      return debounce(func, wait, debounceOptions);
    }

    /**
     * Creates a function that provides `value` to the wrapper function as its
     * first argument. Additional arguments provided to the function are appended
     * to those provided to the wrapper function. The wrapper is executed with
     * the `this` binding of the created function.
     *
     * @static
     * @memberOf _
     * @category Functions
     * @param {*} value The value to wrap.
     * @param {Function} wrapper The wrapper function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var p = _.wrap(_.escape, function(func, text) {
     *   return '<p>' + func(text) + '</p>';
     * });
     *
     * p('Fred, Wilma, & Pebbles');
     * // => '<p>Fred, Wilma, &amp; Pebbles</p>'
     */
    function wrap(value, wrapper) {
      return createWrapper(wrapper, 16, [value]);
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a function that returns `value`.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} value The value to return from the new function.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var object = { 'name': 'fred' };
     * var getter = _.constant(object);
     * getter() === object;
     * // => true
     */
    function constant(value) {
      return function() {
        return value;
      };
    }

    /**
     * Produces a callback bound to an optional `thisArg`. If `func` is a property
     * name the created callback will return the property value for a given element.
     * If `func` is an object the created callback will return `true` for elements
     * that contain the equivalent object properties, otherwise it will return `false`.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} [func=identity] The value to convert to a callback.
     * @param {*} [thisArg] The `this` binding of the created callback.
     * @param {number} [argCount] The number of arguments the callback accepts.
     * @returns {Function} Returns a callback function.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // wrap to create custom callback shorthands
     * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
     *   var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
     *   return !match ? func(callback, thisArg) : function(object) {
     *     return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
     *   };
     * });
     *
     * _.filter(characters, 'age__gt38');
     * // => [{ 'name': 'fred', 'age': 40 }]
     */
    function createCallback(func, thisArg, argCount) {
      var type = typeof func;
      if (func == null || type == 'function') {
        return baseCreateCallback(func, thisArg, argCount);
      }
      // handle "_.pluck" style callback shorthands
      if (type != 'object') {
        return property(func);
      }
      var props = keys(func),
          key = props[0],
          a = func[key];

      // handle "_.where" style callback shorthands
      if (props.length == 1 && a === a && !isObject(a)) {
        // fast path the common case of providing an object with a single
        // property containing a primitive value
        return function(object) {
          var b = object[key];
          return a === b && (a !== 0 || (1 / a == 1 / b));
        };
      }
      return function(object) {
        var length = props.length,
            result = false;

        while (length--) {
          if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) {
            break;
          }
        }
        return result;
      };
    }

    /**
     * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
     * corresponding HTML entities.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} string The string to escape.
     * @returns {string} Returns the escaped string.
     * @example
     *
     * _.escape('Fred, Wilma, & Pebbles');
     * // => 'Fred, Wilma, &amp; Pebbles'
     */
    function escape(string) {
      return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar);
    }

    /**
     * This method returns the first argument provided to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {*} value Any value.
     * @returns {*} Returns `value`.
     * @example
     *
     * var object = { 'name': 'fred' };
     * _.identity(object) === object;
     * // => true
     */
    function identity(value) {
      return value;
    }

    /**
     * Adds function properties of a source object to the destination object.
     * If `object` is a function methods will be added to its prototype as well.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Function|Object} [object=lodash] object The destination object.
     * @param {Object} source The object of functions to add.
     * @param {Object} [options] The options object.
     * @param {boolean} [options.chain=true] Specify whether the functions added are chainable.
     * @example
     *
     * function capitalize(string) {
     *   return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
     * }
     *
     * _.mixin({ 'capitalize': capitalize });
     * _.capitalize('fred');
     * // => 'Fred'
     *
     * _('fred').capitalize().value();
     * // => 'Fred'
     *
     * _.mixin({ 'capitalize': capitalize }, { 'chain': false });
     * _('fred').capitalize();
     * // => 'Fred'
     */
    function mixin(object, source, options) {
      var chain = true,
          methodNames = source && functions(source);

      if (!source || (!options && !methodNames.length)) {
        if (options == null) {
          options = source;
        }
        ctor = lodashWrapper;
        source = object;
        object = lodash;
        methodNames = functions(source);
      }
      if (options === false) {
        chain = false;
      } else if (isObject(options) && 'chain' in options) {
        chain = options.chain;
      }
      var ctor = object,
          isFunc = isFunction(ctor);

      forEach(methodNames, function(methodName) {
        var func = object[methodName] = source[methodName];
        if (isFunc) {
          ctor.prototype[methodName] = function() {
            var chainAll = this.__chain__,
                value = this.__wrapped__,
                args = [value];

            push.apply(args, arguments);
            var result = func.apply(object, args);
            if (chain || chainAll) {
              if (value === result && isObject(result)) {
                return this;
              }
              result = new ctor(result);
              result.__chain__ = chainAll;
            }
            return result;
          };
        }
      });
    }

    /**
     * Reverts the '_' variable to its previous value and returns a reference to
     * the `lodash` function.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @returns {Function} Returns the `lodash` function.
     * @example
     *
     * var lodash = _.noConflict();
     */
    function noConflict() {
      context._ = oldDash;
      return this;
    }

    /**
     * A no-operation function.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @example
     *
     * var object = { 'name': 'fred' };
     * _.noop(object) === undefined;
     * // => true
     */
    function noop() {
      // no operation performed
    }

    /**
     * Gets the number of milliseconds that have elapsed since the Unix epoch
     * (1 January 1970 00:00:00 UTC).
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @example
     *
     * var stamp = _.now();
     * _.defer(function() { console.log(_.now() - stamp); });
     * // => logs the number of milliseconds it took for the deferred function to be called
     */
    var now = isNative(now = Date.now) && now || function() {
      return new Date().getTime();
    };

    /**
     * Converts the given value into an integer of the specified radix.
     * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the
     * `value` is a hexadecimal, in which case a `radix` of `16` is used.
     *
     * Note: This method avoids differences in native ES3 and ES5 `parseInt`
     * implementations. See http://es5.github.io/#E.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} value The value to parse.
     * @param {number} [radix] The radix used to interpret the value to parse.
     * @returns {number} Returns the new integer value.
     * @example
     *
     * _.parseInt('08');
     * // => 8
     */
    var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) {
      // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt`
      return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0);
    };

    /**
     * Creates a "_.pluck" style function, which returns the `key` value of a
     * given object.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} key The name of the property to retrieve.
     * @returns {Function} Returns the new function.
     * @example
     *
     * var characters = [
     *   { 'name': 'fred',   'age': 40 },
     *   { 'name': 'barney', 'age': 36 }
     * ];
     *
     * var getName = _.property('name');
     *
     * _.map(characters, getName);
     * // => ['barney', 'fred']
     *
     * _.sortBy(characters, getName);
     * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred',   'age': 40 }]
     */
    function property(key) {
      return function(object) {
        return object[key];
      };
    }

    /**
     * Produces a random number between `min` and `max` (inclusive). If only one
     * argument is provided a number between `0` and the given number will be
     * returned. If `floating` is truey or either `min` or `max` are floats a
     * floating-point number will be returned instead of an integer.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {number} [min=0] The minimum possible value.
     * @param {number} [max=1] The maximum possible value.
     * @param {boolean} [floating=false] Specify returning a floating-point number.
     * @returns {number} Returns a random number.
     * @example
     *
     * _.random(0, 5);
     * // => an integer between 0 and 5
     *
     * _.random(5);
     * // => also an integer between 0 and 5
     *
     * _.random(5, true);
     * // => a floating-point number between 0 and 5
     *
     * _.random(1.2, 5.2);
     * // => a floating-point number between 1.2 and 5.2
     */
    function random(min, max, floating) {
      var noMin = min == null,
          noMax = max == null;

      if (floating == null) {
        if (typeof min == 'boolean' && noMax) {
          floating = min;
          min = 1;
        }
        else if (!noMax && typeof max == 'boolean') {
          floating = max;
          noMax = true;
        }
      }
      if (noMin && noMax) {
        max = 1;
      }
      min = +min || 0;
      if (noMax) {
        max = min;
        min = 0;
      } else {
        max = +max || 0;
      }
      if (floating || min % 1 || max % 1) {
        var rand = nativeRandom();
        return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max);
      }
      return baseRandom(min, max);
    }

    /**
     * Resolves the value of property `key` on `object`. If `key` is a function
     * it will be invoked with the `this` binding of `object` and its result returned,
     * else the property value is returned. If `object` is falsey then `undefined`
     * is returned.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {Object} object The object to inspect.
     * @param {string} key The name of the property to resolve.
     * @returns {*} Returns the resolved value.
     * @example
     *
     * var object = {
     *   'cheese': 'crumpets',
     *   'stuff': function() {
     *     return 'nonsense';
     *   }
     * };
     *
     * _.result(object, 'cheese');
     * // => 'crumpets'
     *
     * _.result(object, 'stuff');
     * // => 'nonsense'
     */
    function result(object, key) {
      if (object) {
        var value = object[key];
        return isFunction(value) ? object[key]() : value;
      }
    }

    /**
     * A micro-templating method that handles arbitrary delimiters, preserves
     * whitespace, and correctly escapes quotes within interpolated code.
     *
     * Note: In the development build, `_.template` utilizes sourceURLs for easier
     * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
     *
     * For more information on precompiling templates see:
     * http://lodash.com/custom-builds
     *
     * For more information on Chrome extension sandboxes see:
     * http://developer.chrome.com/stable/extensions/sandboxingEval.html
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} text The template text.
     * @param {Object} data The data object used to populate the text.
     * @param {Object} [options] The options object.
     * @param {RegExp} [options.escape] The "escape" delimiter.
     * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
     * @param {Object} [options.imports] An object to import into the template as local variables.
     * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
     * @param {string} [sourceURL] The sourceURL of the template's compiled source.
     * @param {string} [variable] The data object variable name.
     * @returns {Function|string} Returns a compiled function when no `data` object
     *  is given, else it returns the interpolated text.
     * @example
     *
     * // using the "interpolate" delimiter to create a compiled template
     * var compiled = _.template('hello <%= name %>');
     * compiled({ 'name': 'fred' });
     * // => 'hello fred'
     *
     * // using the "escape" delimiter to escape HTML in data property values
     * _.template('<b><%- value %></b>', { 'value': '<script>' });
     * // => '<b>&lt;script&gt;</b>'
     *
     * // using the "evaluate" delimiter to generate HTML
     * var list = '<% _.forEach(people, function(name) { %><li><%- name %></li><% }); %>';
     * _.template(list, { 'people': ['fred', 'barney'] });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
     * _.template('hello ${ name }', { 'name': 'pebbles' });
     * // => 'hello pebbles'
     *
     * // using the internal `print` function in "evaluate" delimiters
     * _.template('<% print("hello " + name); %>!', { 'name': 'barney' });
     * // => 'hello barney!'
     *
     * // using a custom template delimiters
     * _.templateSettings = {
     *   'interpolate': /{{([\s\S]+?)}}/g
     * };
     *
     * _.template('hello {{ name }}!', { 'name': 'mustache' });
     * // => 'hello mustache!'
     *
     * // using the `imports` option to import jQuery
     * var list = '<% jq.each(people, function(name) { %><li><%- name %></li><% }); %>';
     * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
     * // => '<li>fred</li><li>barney</li>'
     *
     * // using the `sourceURL` option to specify a custom sourceURL for the template
     * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
     * compiled(data);
     * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
     *
     * // using the `variable` option to ensure a with-statement isn't used in the compiled template
     * var compiled = _.template('hi <%= data.name %>!', null, { 'variable': 'data' });
     * compiled.source;
     * // => function(data) {
     *   var __t, __p = '', __e = _.escape;
     *   __p += 'hi ' + ((__t = ( data.name )) == null ? '' : __t) + '!';
     *   return __p;
     * }
     *
     * // using the `source` property to inline compiled templates for meaningful
     * // line numbers in error messages and a stack trace
     * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
     *   var JST = {\
     *     "main": ' + _.template(mainText).source + '\
     *   };\
     * ');
     */
    function template(text, data, options) {
      // based on John Resig's `tmpl` implementation
      // http://ejohn.org/blog/javascript-micro-templating/
      // and Laura Doktorova's doT.js
      // https://github.com/olado/doT
      var settings = lodash.templateSettings;
      text = String(text || '');

      // avoid missing dependencies when `iteratorTemplate` is not defined
      options = defaults({}, options, settings);

      var imports = defaults({}, options.imports, settings.imports),
          importsKeys = keys(imports),
          importsValues = values(imports);

      var isEvaluating,
          index = 0,
          interpolate = options.interpolate || reNoMatch,
          source = "__p += '";

      // compile the regexp to match each delimiter
      var reDelimiters = RegExp(
        (options.escape || reNoMatch).source + '|' +
        interpolate.source + '|' +
        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
        (options.evaluate || reNoMatch).source + '|$'
      , 'g');

      text.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
        interpolateValue || (interpolateValue = esTemplateValue);

        // escape characters that cannot be included in string literals
        source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar);

        // replace delimiters with snippets
        if (escapeValue) {
          source += "' +\n__e(" + escapeValue + ") +\n'";
        }
        if (evaluateValue) {
          isEvaluating = true;
          source += "';\n" + evaluateValue + ";\n__p += '";
        }
        if (interpolateValue) {
          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
        }
        index = offset + match.length;

        // the JS engine embedded in Adobe products requires returning the `match`
        // string in order to produce the correct `offset` value
        return match;
      });

      source += "';\n";

      // if `variable` is not specified, wrap a with-statement around the generated
      // code to add the data object to the top of the scope chain
      var variable = options.variable,
          hasVariable = variable;

      if (!hasVariable) {
        variable = 'obj';
        source = 'with (' + variable + ') {\n' + source + '\n}\n';
      }
      // cleanup code by stripping empty strings
      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
        .replace(reEmptyStringMiddle, '$1')
        .replace(reEmptyStringTrailing, '$1;');

      // frame code as the function body
      source = 'function(' + variable + ') {\n' +
        (hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') +
        "var __t, __p = '', __e = _.escape" +
        (isEvaluating
          ? ', __j = Array.prototype.join;\n' +
            "function print() { __p += __j.call(arguments, '') }\n"
          : ';\n'
        ) +
        source +
        'return __p\n}';

      // Use a sourceURL for easier debugging.
      // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
      var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';

      try {
        var result = Function(importsKeys, 'return ' + source + sourceURL).apply(undefined, importsValues);
      } catch(e) {
        e.source = source;
        throw e;
      }
      if (data) {
        return result(data);
      }
      // provide the compiled function's source by its `toString` method, in
      // supported environments, or the `source` property as a convenience for
      // inlining compiled templates during the build process
      result.source = source;
      return result;
    }

    /**
     * Executes the callback `n` times, returning an array of the results
     * of each callback execution. The callback is bound to `thisArg` and invoked
     * with one argument; (index).
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {number} n The number of times to execute the callback.
     * @param {Function} callback The function called per iteration.
     * @param {*} [thisArg] The `this` binding of `callback`.
     * @returns {Array} Returns an array of the results of each `callback` execution.
     * @example
     *
     * var diceRolls = _.times(3, _.partial(_.random, 1, 6));
     * // => [3, 6, 4]
     *
     * _.times(3, function(n) { mage.castSpell(n); });
     * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
     *
     * _.times(3, function(n) { this.cast(n); }, mage);
     * // => also calls `mage.castSpell(n)` three times
     */
    function times(n, callback, thisArg) {
      n = (n = +n) > -1 ? n : 0;
      var index = -1,
          result = Array(n);

      callback = baseCreateCallback(callback, thisArg, 1);
      while (++index < n) {
        result[index] = callback(index);
      }
      return result;
    }

    /**
     * The inverse of `_.escape` this method converts the HTML entities
     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to their
     * corresponding characters.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} string The string to unescape.
     * @returns {string} Returns the unescaped string.
     * @example
     *
     * _.unescape('Fred, Barney &amp; Pebbles');
     * // => 'Fred, Barney & Pebbles'
     */
    function unescape(string) {
      return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar);
    }

    /**
     * Generates a unique ID. If `prefix` is provided the ID will be appended to it.
     *
     * @static
     * @memberOf _
     * @category Utilities
     * @param {string} [prefix] The value to prefix the ID with.
     * @returns {string} Returns the unique ID.
     * @example
     *
     * _.uniqueId('contact_');
     * // => 'contact_104'
     *
     * _.uniqueId();
     * // => '105'
     */
    function uniqueId(prefix) {
      var id = ++idCounter;
      return String(prefix == null ? '' : prefix) + id;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a `lodash` object that wraps the given value with explicit
     * method chaining enabled.
     *
     * @static
     * @memberOf _
     * @category Chaining
     * @param {*} value The value to wrap.
     * @returns {Object} Returns the wrapper object.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney',  'age': 36 },
     *   { 'name': 'fred',    'age': 40 },
     *   { 'name': 'pebbles', 'age': 1 }
     * ];
     *
     * var youngest = _.chain(characters)
     *     .sortBy('age')
     *     .map(function(chr) { return chr.name + ' is ' + chr.age; })
     *     .first()
     *     .value();
     * // => 'pebbles is 1'
     */
    function chain(value) {
      value = new lodashWrapper(value);
      value.__chain__ = true;
      return value;
    }

    /**
     * Invokes `interceptor` with the `value` as the first argument and then
     * returns `value`. The purpose of this method is to "tap into" a method
     * chain in order to perform operations on intermediate results within
     * the chain.
     *
     * @static
     * @memberOf _
     * @category Chaining
     * @param {*} value The value to provide to `interceptor`.
     * @param {Function} interceptor The function to invoke.
     * @returns {*} Returns `value`.
     * @example
     *
     * _([1, 2, 3, 4])
     *  .tap(function(array) { array.pop(); })
     *  .reverse()
     *  .value();
     * // => [3, 2, 1]
     */
    function tap(value, interceptor) {
      interceptor(value);
      return value;
    }

    /**
     * Enables explicit method chaining on the wrapper object.
     *
     * @name chain
     * @memberOf _
     * @category Chaining
     * @returns {*} Returns the wrapper object.
     * @example
     *
     * var characters = [
     *   { 'name': 'barney', 'age': 36 },
     *   { 'name': 'fred',   'age': 40 }
     * ];
     *
     * // without explicit chaining
     * _(characters).first();
     * // => { 'name': 'barney', 'age': 36 }
     *
     * // with explicit chaining
     * _(characters).chain()
     *   .first()
     *   .pick('age')
     *   .value();
     * // => { 'age': 36 }
     */
    function wrapperChain() {
      this.__chain__ = true;
      return this;
    }

    /**
     * Produces the `toString` result of the wrapped value.
     *
     * @name toString
     * @memberOf _
     * @category Chaining
     * @returns {string} Returns the string result.
     * @example
     *
     * _([1, 2, 3]).toString();
     * // => '1,2,3'
     */
    function wrapperToString() {
      return String(this.__wrapped__);
    }

    /**
     * Extracts the wrapped value.
     *
     * @name valueOf
     * @memberOf _
     * @alias value
     * @category Chaining
     * @returns {*} Returns the wrapped value.
     * @example
     *
     * _([1, 2, 3]).valueOf();
     * // => [1, 2, 3]
     */
    function wrapperValueOf() {
      return this.__wrapped__;
    }

    /*--------------------------------------------------------------------------*/

    // add functions that return wrapped values when chaining
    lodash.after = after;
    lodash.assign = assign;
    lodash.at = at;
    lodash.bind = bind;
    lodash.bindAll = bindAll;
    lodash.bindKey = bindKey;
    lodash.chain = chain;
    lodash.compact = compact;
    lodash.compose = compose;
    lodash.constant = constant;
    lodash.countBy = countBy;
    lodash.create = create;
    lodash.createCallback = createCallback;
    lodash.curry = curry;
    lodash.debounce = debounce;
    lodash.defaults = defaults;
    lodash.defer = defer;
    lodash.delay = delay;
    lodash.difference = difference;
    lodash.filter = filter;
    lodash.flatten = flatten;
    lodash.forEach = forEach;
    lodash.forEachRight = forEachRight;
    lodash.forIn = forIn;
    lodash.forInRight = forInRight;
    lodash.forOwn = forOwn;
    lodash.forOwnRight = forOwnRight;
    lodash.functions = functions;
    lodash.groupBy = groupBy;
    lodash.indexBy = indexBy;
    lodash.initial = initial;
    lodash.intersection = intersection;
    lodash.invert = invert;
    lodash.invoke = invoke;
    lodash.keys = keys;
    lodash.map = map;
    lodash.mapValues = mapValues;
    lodash.max = max;
    lodash.memoize = memoize;
    lodash.merge = merge;
    lodash.min = min;
    lodash.omit = omit;
    lodash.once = once;
    lodash.pairs = pairs;
    lodash.partial = partial;
    lodash.partialRight = partialRight;
    lodash.pick = pick;
    lodash.pluck = pluck;
    lodash.property = property;
    lodash.pull = pull;
    lodash.range = range;
    lodash.reject = reject;
    lodash.remove = remove;
    lodash.rest = rest;
    lodash.shuffle = shuffle;
    lodash.sortBy = sortBy;
    lodash.tap = tap;
    lodash.throttle = throttle;
    lodash.times = times;
    lodash.toArray = toArray;
    lodash.transform = transform;
    lodash.union = union;
    lodash.uniq = uniq;
    lodash.values = values;
    lodash.where = where;
    lodash.without = without;
    lodash.wrap = wrap;
    lodash.xor = xor;
    lodash.zip = zip;
    lodash.zipObject = zipObject;

    // add aliases
    lodash.collect = map;
    lodash.drop = rest;
    lodash.each = forEach;
    lodash.eachRight = forEachRight;
    lodash.extend = assign;
    lodash.methods = functions;
    lodash.object = zipObject;
    lodash.select = filter;
    lodash.tail = rest;
    lodash.unique = uniq;
    lodash.unzip = zip;

    // add functions to `lodash.prototype`
    mixin(lodash);

    /*--------------------------------------------------------------------------*/

    // add functions that return unwrapped values when chaining
    lodash.clone = clone;
    lodash.cloneDeep = cloneDeep;
    lodash.contains = contains;
    lodash.escape = escape;
    lodash.every = every;
    lodash.find = find;
    lodash.findIndex = findIndex;
    lodash.findKey = findKey;
    lodash.findLast = findLast;
    lodash.findLastIndex = findLastIndex;
    lodash.findLastKey = findLastKey;
    lodash.has = has;
    lodash.identity = identity;
    lodash.indexOf = indexOf;
    lodash.isArguments = isArguments;
    lodash.isArray = isArray;
    lodash.isBoolean = isBoolean;
    lodash.isDate = isDate;
    lodash.isElement = isElement;
    lodash.isEmpty = isEmpty;
    lodash.isEqual = isEqual;
    lodash.isFinite = isFinite;
    lodash.isFunction = isFunction;
    lodash.isNaN = isNaN;
    lodash.isNull = isNull;
    lodash.isNumber = isNumber;
    lodash.isObject = isObject;
    lodash.isPlainObject = isPlainObject;
    lodash.isRegExp = isRegExp;
    lodash.isString = isString;
    lodash.isUndefined = isUndefined;
    lodash.lastIndexOf = lastIndexOf;
    lodash.mixin = mixin;
    lodash.noConflict = noConflict;
    lodash.noop = noop;
    lodash.now = now;
    lodash.parseInt = parseInt;
    lodash.random = random;
    lodash.reduce = reduce;
    lodash.reduceRight = reduceRight;
    lodash.result = result;
    lodash.runInContext = runInContext;
    lodash.size = size;
    lodash.some = some;
    lodash.sortedIndex = sortedIndex;
    lodash.template = template;
    lodash.unescape = unescape;
    lodash.uniqueId = uniqueId;

    // add aliases
    lodash.all = every;
    lodash.any = some;
    lodash.detect = find;
    lodash.findWhere = find;
    lodash.foldl = reduce;
    lodash.foldr = reduceRight;
    lodash.include = contains;
    lodash.inject = reduce;

    mixin(function() {
      var source = {}
      forOwn(lodash, function(func, methodName) {
        if (!lodash.prototype[methodName]) {
          source[methodName] = func;
        }
      });
      return source;
    }(), false);

    /*--------------------------------------------------------------------------*/

    // add functions capable of returning wrapped and unwrapped values when chaining
    lodash.first = first;
    lodash.last = last;
    lodash.sample = sample;

    // add aliases
    lodash.take = first;
    lodash.head = first;

    forOwn(lodash, function(func, methodName) {
      var callbackable = methodName !== 'sample';
      if (!lodash.prototype[methodName]) {
        lodash.prototype[methodName]= function(n, guard) {
          var chainAll = this.__chain__,
              result = func(this.__wrapped__, n, guard);

          return !chainAll && (n == null || (guard && !(callbackable && typeof n == 'function')))
            ? result
            : new lodashWrapper(result, chainAll);
        };
      }
    });

    /*--------------------------------------------------------------------------*/

    /**
     * The semantic version number.
     *
     * @static
     * @memberOf _
     * @type string
     */
    lodash.VERSION = '2.4.1';

    // add "Chaining" functions to the wrapper
    lodash.prototype.chain = wrapperChain;
    lodash.prototype.toString = wrapperToString;
    lodash.prototype.value = wrapperValueOf;
    lodash.prototype.valueOf = wrapperValueOf;

    // add `Array` functions that return unwrapped values
    forEach(['join', 'pop', 'shift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        var chainAll = this.__chain__,
            result = func.apply(this.__wrapped__, arguments);

        return chainAll
          ? new lodashWrapper(result, chainAll)
          : result;
      };
    });

    // add `Array` functions that return the existing wrapped value
    forEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        func.apply(this.__wrapped__, arguments);
        return this;
      };
    });

    // add `Array` functions that return new wrapped values
    forEach(['concat', 'slice', 'splice'], function(methodName) {
      var func = arrayRef[methodName];
      lodash.prototype[methodName] = function() {
        return new lodashWrapper(func.apply(this.__wrapped__, arguments), this.__chain__);
      };
    });

    return lodash;
  }

  /*--------------------------------------------------------------------------*/

  // expose Lo-Dash
  var _ = runInContext();

  // some AMD build optimizers like r.js check for condition patterns like the following:
  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
    // Expose Lo-Dash to the global object even when an AMD loader is present in
    // case Lo-Dash is loaded with a RequireJS shim config.
    // See http://requirejs.org/docs/api.html#config-shim
    root._ = _;

    // define as an anonymous module so, through path mapping, it can be
    // referenced as the "underscore" module
    define(function() {
      return _;
    });
  }
  // check for `exports` after `define` in case a build optimizer adds an `exports` object
  else if (freeExports && freeModule) {
    // in Node.js or RingoJS
    if (moduleExports) {
      (freeModule.exports = _)._ = _;
    }
    // in Narwhal or Rhino -require
    else {
      freeExports._ = _;
    }
  }
  else {
    // in a browser or Rhino
    root._ = _;
  }
}.call(this));

//     Backbone.js 1.2.1

//     (c) 2010-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
//     Backbone may be freely distributed under the MIT license.
//     For all details and documentation:
//     http://backbonejs.org

(function(factory) {

  // Establish the root object, `window` (`self`) in the browser, or `global` on the server.
  // We use `self` instead of `window` for `WebWorker` support.
  var root = (typeof self == 'object' && self.self == self && self) ||
            (typeof global == 'object' && global.global == global && global);

  // Set up Backbone appropriately for the environment. Start with AMD.
  if (typeof define === 'function' && define.amd) {
    define(['underscore', 'jquery', 'exports'], function(_, $, exports) {
      // Export global even in AMD case in case this script is loaded with
      // others that may still expect a global Backbone.
      root.Backbone = factory(root, exports, _, $);
    });

  // Next for Node.js or CommonJS. jQuery may not be needed as a module.
  } else if (typeof exports !== 'undefined') {
    var _ = require('underscore'), $;
    try { $ = require('jquery'); } catch(e) {}
    factory(root, exports, _, $);

  // Finally, as a browser global.
  } else {
    root.Backbone = factory(root, {}, root._, (root.jQuery || root.Zepto || root.ender || root.$));
  }

}(function(root, Backbone, _, $) {

  // Initial Setup
  // -------------

  // Save the previous value of the `Backbone` variable, so that it can be
  // restored later on, if `noConflict` is used.
  var previousBackbone = root.Backbone;

  // Create a local reference to a common array method we'll want to use later.
  var slice = [].slice;

  // Current version of the library. Keep in sync with `package.json`.
  Backbone.VERSION = '1.2.1';

  // For Backbone's purposes, jQuery, Zepto, Ender, or My Library (kidding) owns
  // the `$` variable.
  Backbone.$ = $;

  // Runs Backbone.js in *noConflict* mode, returning the `Backbone` variable
  // to its previous owner. Returns a reference to this Backbone object.
  Backbone.noConflict = function() {
    root.Backbone = previousBackbone;
    return this;
  };

  // Turn on `emulateHTTP` to support legacy HTTP servers. Setting this option
  // will fake `"PATCH"`, `"PUT"` and `"DELETE"` requests via the `_method` parameter and
  // set a `X-Http-Method-Override` header.
  Backbone.emulateHTTP = false;

  // Turn on `emulateJSON` to support legacy servers that can't deal with direct
  // `application/json` requests ... this will encode the body as
  // `application/x-www-form-urlencoded` instead and will send the model in a
  // form param named `model`.
  Backbone.emulateJSON = false;

  // Proxy Underscore methods to a Backbone class' prototype using a
  // particular attribute as the data argument
  var addMethod = function(length, method, attribute) {
    switch (length) {
      case 1: return function() {
        return _[method](this[attribute]);
      };
      case 2: return function(value) {
        return _[method](this[attribute], value);
      };
      case 3: return function(iteratee, context) {
        return _[method](this[attribute], iteratee, context);
      };
      case 4: return function(iteratee, defaultVal, context) {
        return _[method](this[attribute], iteratee, defaultVal, context);
      };
      default: return function() {
        var args = slice.call(arguments);
        args.unshift(this[attribute]);
        return _[method].apply(_, args);
      };
    }
  };
  var addUnderscoreMethods = function(Class, methods, attribute) {
    _.each(methods, function(length, method) {
      if (_[method]) Class.prototype[method] = addMethod(length, method, attribute);
    });
  };

  // Backbone.Events
  // ---------------

  // A module that can be mixed in to *any object* in order to provide it with
  // custom events. You may bind with `on` or remove with `off` callback
  // functions to an event; `trigger`-ing an event fires all callbacks in
  // succession.
  //
  //     var object = {};
  //     _.extend(object, Backbone.Events);
  //     object.on('expand', function(){ alert('expanded'); });
  //     object.trigger('expand');
  //
  var Events = Backbone.Events = {};

  // Regular expression used to split event strings.
  var eventSplitter = /\s+/;

  // Iterates over the standard `event, callback` (as well as the fancy multiple
  // space-separated events `"change blur", callback` and jQuery-style event
  // maps `{event: callback}`), reducing them by manipulating `memo`.
  // Passes a normalized single event name and callback, as well as any
  // optional `opts`.
  var eventsApi = function(iteratee, memo, name, callback, opts) {
    var i = 0, names;
    if (name && typeof name === 'object') {
      // Handle event maps.
      if (callback !== void 0 && 'context' in opts && opts.context === void 0) opts.context = callback;
      for (names = _.keys(name); i < names.length ; i++) {
        memo = iteratee(memo, names[i], name[names[i]], opts);
      }
    } else if (name && eventSplitter.test(name)) {
      // Handle space separated event names.
      for (names = name.split(eventSplitter); i < names.length; i++) {
        memo = iteratee(memo, names[i], callback, opts);
      }
    } else {
      memo = iteratee(memo, name, callback, opts);
    }
    return memo;
  };

  // Bind an event to a `callback` function. Passing `"all"` will bind
  // the callback to all events fired.
  Events.on = function(name, callback, context) {
    return internalOn(this, name, callback, context);
  };

  // An internal use `on` function, used to guard the `listening` argument from
  // the public API.
  var internalOn = function(obj, name, callback, context, listening) {
    obj._events = eventsApi(onApi, obj._events || {}, name, callback, {
        context: context,
        ctx: obj,
        listening: listening
    });

    if (listening) {
      var listeners = obj._listeners || (obj._listeners = {});
      listeners[listening.id] = listening;
    }

    return obj;
  };

  // Inversion-of-control versions of `on`. Tell *this* object to listen to
  // an event in another object... keeping track of what it's listening to.
  Events.listenTo =  function(obj, name, callback) {
    if (!obj) return this;
    var id = obj._listenId || (obj._listenId = _.uniqueId('l'));
    var listeningTo = this._listeningTo || (this._listeningTo = {});
    var listening = listeningTo[id];

    // This object is not listening to any other events on `obj` yet.
    // Setup the necessary references to track the listening callbacks.
    if (!listening) {
      var thisId = this._listenId || (this._listenId = _.uniqueId('l'));
      listening = listeningTo[id] = {obj: obj, objId: id, id: thisId, listeningTo: listeningTo, count: 0};
    }

    // Bind callbacks on obj, and keep track of them on listening.
    internalOn(obj, name, callback, this, listening);
    return this;
  };

  // The reducing API that adds a callback to the `events` object.
  var onApi = function(events, name, callback, options) {
    if (callback) {
      var handlers = events[name] || (events[name] = []);
      var context = options.context, ctx = options.ctx, listening = options.listening;
      if (listening) listening.count++;

      handlers.push({ callback: callback, context: context, ctx: context || ctx, listening: listening });
    }
    return events;
  };

  // Remove one or many callbacks. If `context` is null, removes all
  // callbacks with that function. If `callback` is null, removes all
  // callbacks for the event. If `name` is null, removes all bound
  // callbacks for all events.
  Events.off =  function(name, callback, context) {
    if (!this._events) return this;
    this._events = eventsApi(offApi, this._events, name, callback, {
        context: context,
        listeners: this._listeners
    });
    return this;
  };

  // Tell this object to stop listening to either specific events ... or
  // to every object it's currently listening to.
  Events.stopListening =  function(obj, name, callback) {
    var listeningTo = this._listeningTo;
    if (!listeningTo) return this;

    var ids = obj ? [obj._listenId] : _.keys(listeningTo);

    for (var i = 0; i < ids.length; i++) {
      var listening = listeningTo[ids[i]];

      // If listening doesn't exist, this object is not currently
      // listening to obj. Break out early.
      if (!listening) break;

      listening.obj.off(name, callback, this);
    }
    if (_.isEmpty(listeningTo)) this._listeningTo = void 0;

    return this;
  };

  // The reducing API that removes a callback from the `events` object.
  var offApi = function(events, name, callback, options) {
    // No events to consider.
    if (!events) return;

    var i = 0, listening;
    var context = options.context, listeners = options.listeners;

    // Delete all events listeners and "drop" events.
    if (!name && !callback && !context) {
      var ids = _.keys(listeners);
      for (; i < ids.length; i++) {
        listening = listeners[ids[i]];
        delete listeners[listening.id];
        delete listening.listeningTo[listening.objId];
      }
      return;
    }

    var names = name ? [name] : _.keys(events);
    for (; i < names.length; i++) {
      name = names[i];
      var handlers = events[name];

      // Bail out if there are no events stored.
      if (!handlers) break;

      // Replace events if there are any remaining.  Otherwise, clean up.
      var remaining = [];
      for (var j = 0; j < handlers.length; j++) {
        var handler = handlers[j];
        if (
          callback && callback !== handler.callback &&
            callback !== handler.callback._callback ||
              context && context !== handler.context
        ) {
          remaining.push(handler);
        } else {
          listening = handler.listening;
          if (listening && --listening.count === 0) {
            delete listeners[listening.id];
            delete listening.listeningTo[listening.objId];
          }
        }
      }

      // Update tail event if the list has any events.  Otherwise, clean up.
      if (remaining.length) {
        events[name] = remaining;
      } else {
        delete events[name];
      }
    }
    if (_.size(events)) return events;
  };

  // Bind an event to only be triggered a single time. After the first time
  // the callback is invoked, it will be removed. When multiple events are
  // passed in using the space-separated syntax, the event will fire once for every
  // event you passed in, not once for a combination of all events
  Events.once =  function(name, callback, context) {
    // Map the event into a `{event: once}` object.
    var events = eventsApi(onceMap, {}, name, callback, _.bind(this.off, this));
    return this.on(events, void 0, context);
  };

  // Inversion-of-control versions of `once`.
  Events.listenToOnce =  function(obj, name, callback) {
    // Map the event into a `{event: once}` object.
    var events = eventsApi(onceMap, {}, name, callback, _.bind(this.stopListening, this, obj));
    return this.listenTo(obj, events);
  };

  // Reduces the event callbacks into a map of `{event: onceWrapper}`.
  // `offer` unbinds the `onceWrapper` after it has been called.
  var onceMap = function(map, name, callback, offer) {
    if (callback) {
      var once = map[name] = _.once(function() {
        offer(name, once);
        callback.apply(this, arguments);
      });
      once._callback = callback;
    }
    return map;
  };

  // Trigger one or many events, firing all bound callbacks. Callbacks are
  // passed the same arguments as `trigger` is, apart from the event name
  // (unless you're listening on `"all"`, which will cause your callback to
  // receive the true name of the event as the first argument).
  Events.trigger =  function(name) {
    if (!this._events) return this;

    var length = Math.max(0, arguments.length - 1);
    var args = Array(length);
    for (var i = 0; i < length; i++) args[i] = arguments[i + 1];

    eventsApi(triggerApi, this._events, name, void 0, args);
    return this;
  };

  // Handles triggering the appropriate event callbacks.
  var triggerApi = function(objEvents, name, cb, args) {
    if (objEvents) {
      var events = objEvents[name];
      var allEvents = objEvents.all;
      if (events && allEvents) allEvents = allEvents.slice();
      if (events) triggerEvents(events, args);
      if (allEvents) triggerEvents(allEvents, [name].concat(args));
    }
    return objEvents;
  };

  // A difficult-to-believe, but optimized internal dispatch function for
  // triggering events. Tries to keep the usual cases speedy (most internal
  // Backbone events have 3 arguments).
  var triggerEvents = function(events, args) {
    var ev, i = -1, l = events.length, a1 = args[0], a2 = args[1], a3 = args[2];
    switch (args.length) {
      case 0: while (++i < l) (ev = events[i]).callback.call(ev.ctx); return;
      case 1: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1); return;
      case 2: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2); return;
      case 3: while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2, a3); return;
      default: while (++i < l) (ev = events[i]).callback.apply(ev.ctx, args); return;
    }
  };

  // Aliases for backwards compatibility.
  Events.bind   = Events.on;
  Events.unbind = Events.off;

  // Allow the `Backbone` object to serve as a global event bus, for folks who
  // want global "pubsub" in a convenient place.
  _.extend(Backbone, Events);

  // Backbone.Model
  // --------------

  // Backbone **Models** are the basic data object in the framework --
  // frequently representing a row in a table in a database on your server.
  // A discrete chunk of data and a bunch of useful, related methods for
  // performing computations and transformations on that data.

  // Create a new model with the specified attributes. A client id (`cid`)
  // is automatically generated and assigned for you.
  var Model = Backbone.Model = function(attributes, options) {
    var attrs = attributes || {};
    options || (options = {});
    this.cid = _.uniqueId(this.cidPrefix);
    this.attributes = {};
    if (options.collection) this.collection = options.collection;
    if (options.parse) attrs = this.parse(attrs, options) || {};
    attrs = _.defaults({}, attrs, _.result(this, 'defaults'));
    this.set(attrs, options);
    this.changed = {};
    this.initialize.apply(this, arguments);
  };

  // Attach all inheritable methods to the Model prototype.
  _.extend(Model.prototype, Events, {

    // A hash of attributes whose current and previous value differ.
    changed: null,

    // The value returned during the last failed validation.
    validationError: null,

    // The default name for the JSON `id` attribute is `"id"`. MongoDB and
    // CouchDB users may want to set this to `"_id"`.
    idAttribute: 'id',

    // The prefix is used to create the client id which is used to identify models locally.
    // You may want to override this if you're experiencing name clashes with model ids.
    cidPrefix: 'c',

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // Return a copy of the model's `attributes` object.
    toJSON: function(options) {
      return _.clone(this.attributes);
    },

    // Proxy `Backbone.sync` by default -- but override this if you need
    // custom syncing semantics for *this* particular model.
    sync: function() {
      return Backbone.sync.apply(this, arguments);
    },

    // Get the value of an attribute.
    get: function(attr) {
      return this.attributes[attr];
    },

    // Get the HTML-escaped value of an attribute.
    escape: function(attr) {
      return _.escape(this.get(attr));
    },

    // Returns `true` if the attribute contains a value that is not null
    // or undefined.
    has: function(attr) {
      return this.get(attr) != null;
    },

    // Special-cased proxy to underscore's `_.matches` method.
    matches: function(attrs) {
      return !!_.iteratee(attrs, this)(this.attributes);
    },

    // Set a hash of model attributes on the object, firing `"change"`. This is
    // the core primitive operation of a model, updating the data and notifying
    // anyone who needs to know about the change in state. The heart of the beast.
    set: function(key, val, options) {
      if (key == null) return this;

      // Handle both `"key", value` and `{key: value}` -style arguments.
      var attrs;
      if (typeof key === 'object') {
        attrs = key;
        options = val;
      } else {
        (attrs = {})[key] = val;
      }

      options || (options = {});

      // Run validation.
      if (!this._validate(attrs, options)) return false;

      // Extract attributes and options.
      var unset      = options.unset;
      var silent     = options.silent;
      var changes    = [];
      var changing   = this._changing;
      this._changing = true;

      if (!changing) {
        this._previousAttributes = _.clone(this.attributes);
        this.changed = {};
      }

      var current = this.attributes;
      var changed = this.changed;
      var prev    = this._previousAttributes;

      // Check for changes of `id`.
      if (this.idAttribute in attrs) this.id = attrs[this.idAttribute];

      // For each `set` attribute, update or delete the current value.
      for (var attr in attrs) {
        val = attrs[attr];
        if (!_.isEqual(current[attr], val)) changes.push(attr);
        if (!_.isEqual(prev[attr], val)) {
          changed[attr] = val;
        } else {
          delete changed[attr];
        }
        unset ? delete current[attr] : current[attr] = val;
      }

      // Trigger all relevant attribute changes.
      if (!silent) {
        if (changes.length) this._pending = options;
        for (var i = 0; i < changes.length; i++) {
          this.trigger('change:' + changes[i], this, current[changes[i]], options);
        }
      }

      // You might be wondering why there's a `while` loop here. Changes can
      // be recursively nested within `"change"` events.
      if (changing) return this;
      if (!silent) {
        while (this._pending) {
          options = this._pending;
          this._pending = false;
          this.trigger('change', this, options);
        }
      }
      this._pending = false;
      this._changing = false;
      return this;
    },

    // Remove an attribute from the model, firing `"change"`. `unset` is a noop
    // if the attribute doesn't exist.
    unset: function(attr, options) {
      return this.set(attr, void 0, _.extend({}, options, {unset: true}));
    },

    // Clear all attributes on the model, firing `"change"`.
    clear: function(options) {
      var attrs = {};
      for (var key in this.attributes) attrs[key] = void 0;
      return this.set(attrs, _.extend({}, options, {unset: true}));
    },

    // Determine if the model has changed since the last `"change"` event.
    // If you specify an attribute name, determine if that attribute has changed.
    hasChanged: function(attr) {
      if (attr == null) return !_.isEmpty(this.changed);
      return _.has(this.changed, attr);
    },

    // Return an object containing all the attributes that have changed, or
    // false if there are no changed attributes. Useful for determining what
    // parts of a view need to be updated and/or what attributes need to be
    // persisted to the server. Unset attributes will be set to undefined.
    // You can also pass an attributes object to diff against the model,
    // determining if there *would be* a change.
    changedAttributes: function(diff) {
      if (!diff) return this.hasChanged() ? _.clone(this.changed) : false;
      var old = this._changing ? this._previousAttributes : this.attributes;
      var changed = {};
      for (var attr in diff) {
        var val = diff[attr];
        if (_.isEqual(old[attr], val)) continue;
        changed[attr] = val;
      }
      return _.size(changed) ? changed : false;
    },

    // Get the previous value of an attribute, recorded at the time the last
    // `"change"` event was fired.
    previous: function(attr) {
      if (attr == null || !this._previousAttributes) return null;
      return this._previousAttributes[attr];
    },

    // Get all of the attributes of the model at the time of the previous
    // `"change"` event.
    previousAttributes: function() {
      return _.clone(this._previousAttributes);
    },

    // Fetch the model from the server, merging the response with the model's
    // local attributes. Any changed attributes will trigger a "change" event.
    fetch: function(options) {
      options = _.extend({parse: true}, options);
      var model = this;
      var success = options.success;
      options.success = function(resp) {
        var serverAttrs = options.parse ? model.parse(resp, options) : resp;
        if (!model.set(serverAttrs, options)) return false;
        if (success) success.call(options.context, model, resp, options);
        model.trigger('sync', model, resp, options);
      };
      wrapError(this, options);
      return this.sync('read', this, options);
    },

    // Set a hash of model attributes, and sync the model to the server.
    // If the server returns an attributes hash that differs, the model's
    // state will be `set` again.
    save: function(key, val, options) {
      // Handle both `"key", value` and `{key: value}` -style arguments.
      var attrs;
      if (key == null || typeof key === 'object') {
        attrs = key;
        options = val;
      } else {
        (attrs = {})[key] = val;
      }

      options = _.extend({validate: true, parse: true}, options);
      var wait = options.wait;

      // If we're not waiting and attributes exist, save acts as
      // `set(attr).save(null, opts)` with validation. Otherwise, check if
      // the model will be valid when the attributes, if any, are set.
      if (attrs && !wait) {
        if (!this.set(attrs, options)) return false;
      } else {
        if (!this._validate(attrs, options)) return false;
      }

      // After a successful server-side save, the client is (optionally)
      // updated with the server-side state.
      var model = this;
      var success = options.success;
      var attributes = this.attributes;
      options.success = function(resp) {
        // Ensure attributes are restored during synchronous saves.
        model.attributes = attributes;
        var serverAttrs = options.parse ? model.parse(resp, options) : resp;
        if (wait) serverAttrs = _.extend({}, attrs, serverAttrs);
        if (serverAttrs && !model.set(serverAttrs, options)) return false;
        if (success) success.call(options.context, model, resp, options);
        model.trigger('sync', model, resp, options);
      };
      wrapError(this, options);

      // Set temporary attributes if `{wait: true}` to properly find new ids.
      if (attrs && wait) this.attributes = _.extend({}, attributes, attrs);

      var method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update');
      if (method === 'patch' && !options.attrs) options.attrs = attrs;
      var xhr = this.sync(method, this, options);

      // Restore attributes.
      this.attributes = attributes;

      return xhr;
    },

    // Destroy this model on the server if it was already persisted.
    // Optimistically removes the model from its collection, if it has one.
    // If `wait: true` is passed, waits for the server to respond before removal.
    destroy: function(options) {
      options = options ? _.clone(options) : {};
      var model = this;
      var success = options.success;
      var wait = options.wait;

      var destroy = function() {
        model.stopListening();
        model.trigger('destroy', model, model.collection, options);
      };

      options.success = function(resp) {
        if (wait) destroy();
        if (success) success.call(options.context, model, resp, options);
        if (!model.isNew()) model.trigger('sync', model, resp, options);
      };

      var xhr = false;
      if (this.isNew()) {
        _.defer(options.success);
      } else {
        wrapError(this, options);
        xhr = this.sync('delete', this, options);
      }
      if (!wait) destroy();
      return xhr;
    },

    // Default URL for the model's representation on the server -- if you're
    // using Backbone's restful methods, override this to change the endpoint
    // that will be called.
    url: function() {
      var base =
        _.result(this, 'urlRoot') ||
        _.result(this.collection, 'url') ||
        urlError();
      if (this.isNew()) return base;
      var id = this.get(this.idAttribute);
      return base.replace(/[^\/]$/, '$&/') + encodeURIComponent(id);
    },

    // **parse** converts a response into the hash of attributes to be `set` on
    // the model. The default implementation is just to pass the response along.
    parse: function(resp, options) {
      return resp;
    },

    // Create a new model with identical attributes to this one.
    clone: function() {
      return new this.constructor(this.attributes);
    },

    // A model is new if it has never been saved to the server, and lacks an id.
    isNew: function() {
      return !this.has(this.idAttribute);
    },

    // Check if the model is currently in a valid state.
    isValid: function(options) {
      return this._validate({}, _.defaults({validate: true}, options));
    },

    // Run validation against the next complete set of model attributes,
    // returning `true` if all is well. Otherwise, fire an `"invalid"` event.
    _validate: function(attrs, options) {
      if (!options.validate || !this.validate) return true;
      attrs = _.extend({}, this.attributes, attrs);
      var error = this.validationError = this.validate(attrs, options) || null;
      if (!error) return true;
      this.trigger('invalid', this, error, _.extend(options, {validationError: error}));
      return false;
    }

  });

  // Underscore methods that we want to implement on the Model.
  var modelMethods = { keys: 1, values: 1, pairs: 1, invert: 1, pick: 0,
      omit: 0, chain: 1, isEmpty: 1 };

  // Mix in each Underscore method as a proxy to `Model#attributes`.
  addUnderscoreMethods(Model, modelMethods, 'attributes');

  // Backbone.Collection
  // -------------------

  // If models tend to represent a single row of data, a Backbone Collection is
  // more analogous to a table full of data ... or a small slice or page of that
  // table, or a collection of rows that belong together for a particular reason
  // -- all of the messages in this particular folder, all of the documents
  // belonging to this particular author, and so on. Collections maintain
  // indexes of their models, both in order, and for lookup by `id`.

  // Create a new **Collection**, perhaps to contain a specific type of `model`.
  // If a `comparator` is specified, the Collection will maintain
  // its models in sort order, as they're added and removed.
  var Collection = Backbone.Collection = function(models, options) {
    options || (options = {});
    if (options.model) this.model = options.model;
    if (options.comparator !== void 0) this.comparator = options.comparator;
    this._reset();
    this.initialize.apply(this, arguments);
    if (models) this.reset(models, _.extend({silent: true}, options));
  };

  // Default options for `Collection#set`.
  var setOptions = {add: true, remove: true, merge: true};
  var addOptions = {add: true, remove: false};

  // Define the Collection's inheritable methods.
  _.extend(Collection.prototype, Events, {

    // The default model for a collection is just a **Backbone.Model**.
    // This should be overridden in most cases.
    model: Model,

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // The JSON representation of a Collection is an array of the
    // models' attributes.
    toJSON: function(options) {
      return this.map(function(model) { return model.toJSON(options); });
    },

    // Proxy `Backbone.sync` by default.
    sync: function() {
      return Backbone.sync.apply(this, arguments);
    },

    // Add a model, or list of models to the set.
    add: function(models, options) {
      return this.set(models, _.extend({merge: false}, options, addOptions));
    },

    // Remove a model, or a list of models from the set.
    remove: function(models, options) {
      options = _.extend({}, options);
      var singular = !_.isArray(models);
      models = singular ? [models] : _.clone(models);
      var removed = this._removeModels(models, options);
      if (!options.silent && removed) this.trigger('update', this, options);
      return singular ? removed[0] : removed;
    },

    // Update a collection by `set`-ing a new list of models, adding new ones,
    // removing models that are no longer present, and merging models that
    // already exist in the collection, as necessary. Similar to **Model#set**,
    // the core operation for updating the data contained by the collection.
    set: function(models, options) {
      options = _.defaults({}, options, setOptions);
      if (options.parse && !this._isModel(models)) models = this.parse(models, options);
      var singular = !_.isArray(models);
      models = singular ? (models ? [models] : []) : models.slice();
      var id, model, attrs, existing, sort;
      var at = options.at;
      if (at != null) at = +at;
      if (at < 0) at += this.length + 1;
      var sortable = this.comparator && (at == null) && options.sort !== false;
      var sortAttr = _.isString(this.comparator) ? this.comparator : null;
      var toAdd = [], toRemove = [], modelMap = {};
      var add = options.add, merge = options.merge, remove = options.remove;
      var order = !sortable && add && remove ? [] : false;
      var orderChanged = false;

      // Turn bare objects into model references, and prevent invalid models
      // from being added.
      for (var i = 0; i < models.length; i++) {
        attrs = models[i];

        // If a duplicate is found, prevent it from being added and
        // optionally merge it into the existing model.
        if (existing = this.get(attrs)) {
          if (remove) modelMap[existing.cid] = true;
          if (merge && attrs !== existing) {
            attrs = this._isModel(attrs) ? attrs.attributes : attrs;
            if (options.parse) attrs = existing.parse(attrs, options);
            existing.set(attrs, options);
            if (sortable && !sort && existing.hasChanged(sortAttr)) sort = true;
          }
          models[i] = existing;

        // If this is a new, valid model, push it to the `toAdd` list.
        } else if (add) {
          model = models[i] = this._prepareModel(attrs, options);
          if (!model) continue;
          toAdd.push(model);
          this._addReference(model, options);
        }

        // Do not add multiple models with the same `id`.
        model = existing || model;
        if (!model) continue;
        id = this.modelId(model.attributes);
        if (order && (model.isNew() || !modelMap[id])) {
          order.push(model);

          // Check to see if this is actually a new model at this index.
          orderChanged = orderChanged || !this.models[i] || model.cid !== this.models[i].cid;
        }

        modelMap[id] = true;
      }

      // Remove nonexistent models if appropriate.
      if (remove) {
        for (var i = 0; i < this.length; i++) {
          if (!modelMap[(model = this.models[i]).cid]) toRemove.push(model);
        }
        if (toRemove.length) this._removeModels(toRemove, options);
      }

      // See if sorting is needed, update `length` and splice in new models.
      if (toAdd.length || orderChanged) {
        if (sortable) sort = true;
        this.length += toAdd.length;
        if (at != null) {
          for (var i = 0; i < toAdd.length; i++) {
            this.models.splice(at + i, 0, toAdd[i]);
          }
        } else {
          if (order) this.models.length = 0;
          var orderedModels = order || toAdd;
          for (var i = 0; i < orderedModels.length; i++) {
            this.models.push(orderedModels[i]);
          }
        }
      }

      // Silently sort the collection if appropriate.
      if (sort) this.sort({silent: true});

      // Unless silenced, it's time to fire all appropriate add/sort events.
      if (!options.silent) {
        var addOpts = at != null ? _.clone(options) : options;
        for (var i = 0; i < toAdd.length; i++) {
          if (at != null) addOpts.index = at + i;
          (model = toAdd[i]).trigger('add', model, this, addOpts);
        }
        if (sort || orderChanged) this.trigger('sort', this, options);
        if (toAdd.length || toRemove.length) this.trigger('update', this, options);
      }

      // Return the added (or merged) model (or models).
      return singular ? models[0] : models;
    },

    // When you have more items than you want to add or remove individually,
    // you can reset the entire set with a new list of models, without firing
    // any granular `add` or `remove` events. Fires `reset` when finished.
    // Useful for bulk operations and optimizations.
    reset: function(models, options) {
      options = options ? _.clone(options) : {};
      for (var i = 0; i < this.models.length; i++) {
        this._removeReference(this.models[i], options);
      }
      options.previousModels = this.models;
      this._reset();
      models = this.add(models, _.extend({silent: true}, options));
      if (!options.silent) this.trigger('reset', this, options);
      return models;
    },

    // Add a model to the end of the collection.
    push: function(model, options) {
      return this.add(model, _.extend({at: this.length}, options));
    },

    // Remove a model from the end of the collection.
    pop: function(options) {
      var model = this.at(this.length - 1);
      return this.remove(model, options);
    },

    // Add a model to the beginning of the collection.
    unshift: function(model, options) {
      return this.add(model, _.extend({at: 0}, options));
    },

    // Remove a model from the beginning of the collection.
    shift: function(options) {
      var model = this.at(0);
      return this.remove(model, options);
    },

    // Slice out a sub-array of models from the collection.
    slice: function() {
      return slice.apply(this.models, arguments);
    },

    // Get a model from the set by id.
    get: function(obj) {
      if (obj == null) return void 0;
      var id = this.modelId(this._isModel(obj) ? obj.attributes : obj);
      return this._byId[obj] || this._byId[id] || this._byId[obj.cid];
    },

    // Get the model at the given index.
    at: function(index) {
      if (index < 0) index += this.length;
      return this.models[index];
    },

    // Return models with matching attributes. Useful for simple cases of
    // `filter`.
    where: function(attrs, first) {
      var matches = _.matches(attrs);
      return this[first ? 'find' : 'filter'](function(model) {
        return matches(model.attributes);
      });
    },

    // Return the first model with matching attributes. Useful for simple cases
    // of `find`.
    findWhere: function(attrs) {
      return this.where(attrs, true);
    },

    // Force the collection to re-sort itself. You don't need to call this under
    // normal circumstances, as the set will maintain sort order as each item
    // is added.
    sort: function(options) {
      if (!this.comparator) throw new Error('Cannot sort a set without a comparator');
      options || (options = {});

      // Run sort based on type of `comparator`.
      if (_.isString(this.comparator) || this.comparator.length === 1) {
        this.models = this.sortBy(this.comparator, this);
      } else {
        this.models.sort(_.bind(this.comparator, this));
      }

      if (!options.silent) this.trigger('sort', this, options);
      return this;
    },

    // Pluck an attribute from each model in the collection.
    pluck: function(attr) {
      return _.invoke(this.models, 'get', attr);
    },

    // Fetch the default set of models for this collection, resetting the
    // collection when they arrive. If `reset: true` is passed, the response
    // data will be passed through the `reset` method instead of `set`.
    fetch: function(options) {
      options = _.extend({parse: true}, options);
      var success = options.success;
      var collection = this;
      options.success = function(resp) {
        var method = options.reset ? 'reset' : 'set';
        collection[method](resp, options);
        if (success) success.call(options.context, collection, resp, options);
        collection.trigger('sync', collection, resp, options);
      };
      wrapError(this, options);
      return this.sync('read', this, options);
    },

    // Create a new instance of a model in this collection. Add the model to the
    // collection immediately, unless `wait: true` is passed, in which case we
    // wait for the server to agree.
    create: function(model, options) {
      options = options ? _.clone(options) : {};
      var wait = options.wait;
      model = this._prepareModel(model, options);
      if (!model) return false;
      if (!wait) this.add(model, options);
      var collection = this;
      var success = options.success;
      options.success = function(model, resp, callbackOpts) {
        if (wait) collection.add(model, callbackOpts);
        if (success) success.call(callbackOpts.context, model, resp, callbackOpts);
      };
      model.save(null, options);
      return model;
    },

    // **parse** converts a response into a list of models to be added to the
    // collection. The default implementation is just to pass it through.
    parse: function(resp, options) {
      return resp;
    },

    // Create a new collection with an identical list of models as this one.
    clone: function() {
      return new this.constructor(this.models, {
        model: this.model,
        comparator: this.comparator
      });
    },

    // Define how to uniquely identify models in the collection.
    modelId: function (attrs) {
      return attrs[this.model.prototype.idAttribute || 'id'];
    },

    // Private method to reset all internal state. Called when the collection
    // is first initialized or reset.
    _reset: function() {
      this.length = 0;
      this.models = [];
      this._byId  = {};
    },

    // Prepare a hash of attributes (or other model) to be added to this
    // collection.
    _prepareModel: function(attrs, options) {
      if (this._isModel(attrs)) {
        if (!attrs.collection) attrs.collection = this;
        return attrs;
      }
      options = options ? _.clone(options) : {};
      options.collection = this;
      var model = new this.model(attrs, options);
      if (!model.validationError) return model;
      this.trigger('invalid', this, model.validationError, options);
      return false;
    },

    // Internal method called by both remove and set.
    // Returns removed models, or false if nothing is removed.
    _removeModels: function(models, options) {
      var removed = [];
      for (var i = 0; i < models.length; i++) {
        var model = this.get(models[i]);
        if (!model) continue;

        var index = this.indexOf(model);
        this.models.splice(index, 1);
        this.length--;

        if (!options.silent) {
          options.index = index;
          model.trigger('remove', model, this, options);
        }

        removed.push(model);
        this._removeReference(model, options);
      }
      return removed.length ? removed : false;
    },

    // Method for checking whether an object should be considered a model for
    // the purposes of adding to the collection.
    _isModel: function (model) {
      return model instanceof Model;
    },

    // Internal method to create a model's ties to a collection.
    _addReference: function(model, options) {
      this._byId[model.cid] = model;
      var id = this.modelId(model.attributes);
      if (id != null) this._byId[id] = model;
      model.on('all', this._onModelEvent, this);
    },

    // Internal method to sever a model's ties to a collection.
    _removeReference: function(model, options) {
      delete this._byId[model.cid];
      var id = this.modelId(model.attributes);
      if (id != null) delete this._byId[id];
      if (this === model.collection) delete model.collection;
      model.off('all', this._onModelEvent, this);
    },

    // Internal method called every time a model in the set fires an event.
    // Sets need to update their indexes when models change ids. All other
    // events simply proxy through. "add" and "remove" events that originate
    // in other collections are ignored.
    _onModelEvent: function(event, model, collection, options) {
      if ((event === 'add' || event === 'remove') && collection !== this) return;
      if (event === 'destroy') this.remove(model, options);
      if (event === 'change') {
        var prevId = this.modelId(model.previousAttributes());
        var id = this.modelId(model.attributes);
        if (prevId !== id) {
          if (prevId != null) delete this._byId[prevId];
          if (id != null) this._byId[id] = model;
        }
      }
      this.trigger.apply(this, arguments);
    }

  });

  // Underscore methods that we want to implement on the Collection.
  // 90% of the core usefulness of Backbone Collections is actually implemented
  // right here:
  var collectionMethods = { forEach: 3, each: 3, map: 3, collect: 3, reduce: 4,
      foldl: 4, inject: 4, reduceRight: 4, foldr: 4, find: 3, detect: 3, filter: 3,
      select: 3, reject: 3, every: 3, all: 3, some: 3, any: 3, include: 2,
      contains: 2, invoke: 0, max: 3, min: 3, toArray: 1, size: 1, first: 3,
      head: 3, take: 3, initial: 3, rest: 3, tail: 3, drop: 3, last: 3,
      without: 0, difference: 0, indexOf: 3, shuffle: 1, lastIndexOf: 3,
      isEmpty: 1, chain: 1, sample: 3, partition: 3 };

  // Mix in each Underscore method as a proxy to `Collection#models`.
  addUnderscoreMethods(Collection, collectionMethods, 'models');

  // Underscore methods that take a property name as an argument.
  var attributeMethods = ['groupBy', 'countBy', 'sortBy', 'indexBy'];

  // Use attributes instead of properties.
  _.each(attributeMethods, function(method) {
    if (!_[method]) return;
    Collection.prototype[method] = function(value, context) {
      var iterator = _.isFunction(value) ? value : function(model) {
        return model.get(value);
      };
      return _[method](this.models, iterator, context);
    };
  });

  // Backbone.View
  // -------------

  // Backbone Views are almost more convention than they are actual code. A View
  // is simply a JavaScript object that represents a logical chunk of UI in the
  // DOM. This might be a single item, an entire list, a sidebar or panel, or
  // even the surrounding frame which wraps your whole app. Defining a chunk of
  // UI as a **View** allows you to define your DOM events declaratively, without
  // having to worry about render order ... and makes it easy for the view to
  // react to specific changes in the state of your models.

  // Creating a Backbone.View creates its initial element outside of the DOM,
  // if an existing element is not provided...
  var View = Backbone.View = function(options) {
    this.cid = _.uniqueId('view');
    _.extend(this, _.pick(options, viewOptions));
    this._ensureElement();
    this.initialize.apply(this, arguments);
  };

  // Cached regex to split keys for `delegate`.
  var delegateEventSplitter = /^(\S+)\s*(.*)$/;

  // List of view options to be merged as properties.
  var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events'];

  // Set up all inheritable **Backbone.View** properties and methods.
  _.extend(View.prototype, Events, {

    // The default `tagName` of a View's element is `"div"`.
    tagName: 'div',

    // jQuery delegate for element lookup, scoped to DOM elements within the
    // current view. This should be preferred to global lookups where possible.
    $: function(selector) {
      return this.$el.find(selector);
    },

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // **render** is the core function that your view should override, in order
    // to populate its element (`this.el`), with the appropriate HTML. The
    // convention is for **render** to always return `this`.
    render: function() {
      return this;
    },

    // Remove this view by taking the element out of the DOM, and removing any
    // applicable Backbone.Events listeners.
    remove: function() {
      this._removeElement();
      this.stopListening();
      return this;
    },

    // Remove this view's element from the document and all event listeners
    // attached to it. Exposed for subclasses using an alternative DOM
    // manipulation API.
    _removeElement: function() {
      this.$el.remove();
    },

    // Change the view's element (`this.el` property) and re-delegate the
    // view's events on the new element.
    setElement: function(element) {
      this.undelegateEvents();
      this._setElement(element);
      this.delegateEvents();
      return this;
    },

    // Creates the `this.el` and `this.$el` references for this view using the
    // given `el`. `el` can be a CSS selector or an HTML string, a jQuery
    // context or an element. Subclasses can override this to utilize an
    // alternative DOM manipulation API and are only required to set the
    // `this.el` property.
    _setElement: function(el) {
      this.$el = el instanceof Backbone.$ ? el : Backbone.$(el);
      this.el = this.$el[0];
    },

    // Set callbacks, where `this.events` is a hash of
    //
    // *{"event selector": "callback"}*
    //
    //     {
    //       'mousedown .title':  'edit',
    //       'click .button':     'save',
    //       'click .open':       function(e) { ... }
    //     }
    //
    // pairs. Callbacks will be bound to the view, with `this` set properly.
    // Uses event delegation for efficiency.
    // Omitting the selector binds the event to `this.el`.
    delegateEvents: function(events) {
      events || (events = _.result(this, 'events'));
      if (!events) return this;
      this.undelegateEvents();
      for (var key in events) {
        var method = events[key];
        if (!_.isFunction(method)) method = this[method];
        if (!method) continue;
        var match = key.match(delegateEventSplitter);
        this.delegate(match[1], match[2], _.bind(method, this));
      }
      return this;
    },

    // Add a single event listener to the view's element (or a child element
    // using `selector`). This only works for delegate-able events: not `focus`,
    // `blur`, and not `change`, `submit`, and `reset` in Internet Explorer.
    delegate: function(eventName, selector, listener) {
      this.$el.on(eventName + '.delegateEvents' + this.cid, selector, listener);
      return this;
    },

    // Clears all callbacks previously bound to the view by `delegateEvents`.
    // You usually don't need to use this, but may wish to if you have multiple
    // Backbone views attached to the same DOM element.
    undelegateEvents: function() {
      if (this.$el) this.$el.off('.delegateEvents' + this.cid);
      return this;
    },

    // A finer-grained `undelegateEvents` for removing a single delegated event.
    // `selector` and `listener` are both optional.
    undelegate: function(eventName, selector, listener) {
      this.$el.off(eventName + '.delegateEvents' + this.cid, selector, listener);
      return this;
    },

    // Produces a DOM element to be assigned to your view. Exposed for
    // subclasses using an alternative DOM manipulation API.
    _createElement: function(tagName) {
      return document.createElement(tagName);
    },

    // Ensure that the View has a DOM element to render into.
    // If `this.el` is a string, pass it through `$()`, take the first
    // matching element, and re-assign it to `el`. Otherwise, create
    // an element from the `id`, `className` and `tagName` properties.
    _ensureElement: function() {
      if (!this.el) {
        var attrs = _.extend({}, _.result(this, 'attributes'));
        if (this.id) attrs.id = _.result(this, 'id');
        if (this.className) attrs['class'] = _.result(this, 'className');
        this.setElement(this._createElement(_.result(this, 'tagName')));
        this._setAttributes(attrs);
      } else {
        this.setElement(_.result(this, 'el'));
      }
    },

    // Set attributes from a hash on this view's element.  Exposed for
    // subclasses using an alternative DOM manipulation API.
    _setAttributes: function(attributes) {
      this.$el.attr(attributes);
    }

  });

  // Backbone.sync
  // -------------

  // Override this function to change the manner in which Backbone persists
  // models to the server. You will be passed the type of request, and the
  // model in question. By default, makes a RESTful Ajax request
  // to the model's `url()`. Some possible customizations could be:
  //
  // * Use `setTimeout` to batch rapid-fire updates into a single request.
  // * Send up the models as XML instead of JSON.
  // * Persist models via WebSockets instead of Ajax.
  //
  // Turn on `Backbone.emulateHTTP` in order to send `PUT` and `DELETE` requests
  // as `POST`, with a `_method` parameter containing the true HTTP method,
  // as well as all requests with the body as `application/x-www-form-urlencoded`
  // instead of `application/json` with the model in a param named `model`.
  // Useful when interfacing with server-side languages like **PHP** that make
  // it difficult to read the body of `PUT` requests.
  Backbone.sync = function(method, model, options) {
    var type = methodMap[method];

    // Default options, unless specified.
    _.defaults(options || (options = {}), {
      emulateHTTP: Backbone.emulateHTTP,
      emulateJSON: Backbone.emulateJSON
    });

    // Default JSON-request options.
    var params = {type: type, dataType: 'json'};

    // Ensure that we have a URL.
    if (!options.url) {
      params.url = _.result(model, 'url') || urlError();
    }

    // Ensure that we have the appropriate request data.
    if (options.data == null && model && (method === 'create' || method === 'update' || method === 'patch')) {
      params.contentType = 'application/json';
      params.data = JSON.stringify(options.attrs || model.toJSON(options));
    }

    // For older servers, emulate JSON by encoding the request into an HTML-form.
    if (options.emulateJSON) {
      params.contentType = 'application/x-www-form-urlencoded';
      params.data = params.data ? {model: params.data} : {};
    }

    // For older servers, emulate HTTP by mimicking the HTTP method with `_method`
    // And an `X-HTTP-Method-Override` header.
    if (options.emulateHTTP && (type === 'PUT' || type === 'DELETE' || type === 'PATCH')) {
      params.type = 'POST';
      if (options.emulateJSON) params.data._method = type;
      var beforeSend = options.beforeSend;
      options.beforeSend = function(xhr) {
        xhr.setRequestHeader('X-HTTP-Method-Override', type);
        if (beforeSend) return beforeSend.apply(this, arguments);
      };
    }

    // Don't process data on a non-GET request.
    if (params.type !== 'GET' && !options.emulateJSON) {
      params.processData = false;
    }

    // Pass along `textStatus` and `errorThrown` from jQuery.
    var error = options.error;
    options.error = function(xhr, textStatus, errorThrown) {
      options.textStatus = textStatus;
      options.errorThrown = errorThrown;
      if (error) error.call(options.context, xhr, textStatus, errorThrown);
    };

    // Make the request, allowing the user to override any Ajax options.
    var xhr = options.xhr = Backbone.ajax(_.extend(params, options));
    model.trigger('request', model, xhr, options);
    return xhr;
  };

  // Map from CRUD to HTTP for our default `Backbone.sync` implementation.
  var methodMap = {
    'create': 'POST',
    'update': 'PUT',
    'patch':  'PATCH',
    'delete': 'DELETE',
    'read':   'GET'
  };

  // Set the default implementation of `Backbone.ajax` to proxy through to `$`.
  // Override this if you'd like to use a different library.
  Backbone.ajax = function() {
    return Backbone.$.ajax.apply(Backbone.$, arguments);
  };

  // Backbone.Router
  // ---------------

  // Routers map faux-URLs to actions, and fire events when routes are
  // matched. Creating a new one sets its `routes` hash, if not set statically.
  var Router = Backbone.Router = function(options) {
    options || (options = {});
    if (options.routes) this.routes = options.routes;
    this._bindRoutes();
    this.initialize.apply(this, arguments);
  };

  // Cached regular expressions for matching named param parts and splatted
  // parts of route strings.
  var optionalParam = /\((.*?)\)/g;
  var namedParam    = /(\(\?)?:\w+/g;
  var splatParam    = /\*\w+/g;
  var escapeRegExp  = /[\-{}\[\]+?.,\\\^$|#\s]/g;

  // Set up all inheritable **Backbone.Router** properties and methods.
  _.extend(Router.prototype, Events, {

    // Initialize is an empty function by default. Override it with your own
    // initialization logic.
    initialize: function(){},

    // Manually bind a single named route to a callback. For example:
    //
    //     this.route('search/:query/p:num', 'search', function(query, num) {
    //       ...
    //     });
    //
    route: function(route, name, callback) {
      if (!_.isRegExp(route)) route = this._routeToRegExp(route);
      if (_.isFunction(name)) {
        callback = name;
        name = '';
      }
      if (!callback) callback = this[name];
      var router = this;
      Backbone.history.route(route, function(fragment) {
        var args = router._extractParameters(route, fragment);
        if (router.execute(callback, args, name) !== false) {
          router.trigger.apply(router, ['route:' + name].concat(args));
          router.trigger('route', name, args);
          Backbone.history.trigger('route', router, name, args);
        }
      });
      return this;
    },

    // Execute a route handler with the provided parameters.  This is an
    // excellent place to do pre-route setup or post-route cleanup.
    execute: function(callback, args, name) {
      if (callback) callback.apply(this, args);
    },

    // Simple proxy to `Backbone.history` to save a fragment into the history.
    navigate: function(fragment, options) {
      Backbone.history.navigate(fragment, options);
      return this;
    },

    // Bind all defined routes to `Backbone.history`. We have to reverse the
    // order of the routes here to support behavior where the most general
    // routes can be defined at the bottom of the route map.
    _bindRoutes: function() {
      if (!this.routes) return;
      this.routes = _.result(this, 'routes');
      var route, routes = _.keys(this.routes);
      while ((route = routes.pop()) != null) {
        this.route(route, this.routes[route]);
      }
    },

    // Convert a route string into a regular expression, suitable for matching
    // against the current location hash.
    _routeToRegExp: function(route) {
      route = route.replace(escapeRegExp, '\\$&')
                   .replace(optionalParam, '(?:$1)?')
                   .replace(namedParam, function(match, optional) {
                     return optional ? match : '([^/?]+)';
                   })
                   .replace(splatParam, '([^?]*?)');
      return new RegExp('^' + route + '(?:\\?([\\s\\S]*))?$');
    },

    // Given a route, and a URL fragment that it matches, return the array of
    // extracted decoded parameters. Empty or unmatched parameters will be
    // treated as `null` to normalize cross-browser behavior.
    _extractParameters: function(route, fragment) {
      var params = route.exec(fragment).slice(1);
      return _.map(params, function(param, i) {
        // Don't decode the search params.
        if (i === params.length - 1) return param || null;
        return param ? decodeURIComponent(param) : null;
      });
    }

  });

  // Backbone.History
  // ----------------

  // Handles cross-browser history management, based on either
  // [pushState](http://diveintohtml5.info/history.html) and real URLs, or
  // [onhashchange](https://developer.mozilla.org/en-US/docs/DOM/window.onhashchange)
  // and URL fragments. If the browser supports neither (old IE, natch),
  // falls back to polling.
  var History = Backbone.History = function() {
    this.handlers = [];
    _.bindAll(this, 'checkUrl');

    // Ensure that `History` can be used outside of the browser.
    if (typeof window !== 'undefined') {
      this.location = window.location;
      this.history = window.history;
    }
  };

  // Cached regex for stripping a leading hash/slash and trailing space.
  var routeStripper = /^[#\/]|\s+$/g;

  // Cached regex for stripping leading and trailing slashes.
  var rootStripper = /^\/+|\/+$/g;

  // Cached regex for stripping urls of hash.
  var pathStripper = /#.*$/;

  // Has the history handling already been started?
  History.started = false;

  // Set up all inheritable **Backbone.History** properties and methods.
  _.extend(History.prototype, Events, {

    // The default interval to poll for hash changes, if necessary, is
    // twenty times a second.
    interval: 50,

    // Are we at the app root?
    atRoot: function() {
      var path = this.location.pathname.replace(/[^\/]$/, '$&/');
      return path === this.root && !this.getSearch();
    },

    // Does the pathname match the root?
    matchRoot: function() {
      var path = this.decodeFragment(this.location.pathname);
      var root = path.slice(0, this.root.length - 1) + '/';
      return root === this.root;
    },

    // Unicode characters in `location.pathname` are percent encoded so they're
    // decoded for comparison. `%25` should not be decoded since it may be part
    // of an encoded parameter.
    decodeFragment: function(fragment) {
      return decodeURI(fragment.replace(/%25/g, '%2525'));
    },

    // In IE6, the hash fragment and search params are incorrect if the
    // fragment contains `?`.
    getSearch: function() {
      var match = this.location.href.replace(/#.*/, '').match(/\?.+/);
      return match ? match[0] : '';
    },

    // Gets the true hash value. Cannot use location.hash directly due to bug
    // in Firefox where location.hash will always be decoded.
    getHash: function(window) {
      var match = (window || this).location.href.match(/#(.*)$/);
      return match ? match[1] : '';
    },

    // Get the pathname and search params, without the root.
    getPath: function() {
      var path = this.decodeFragment(
        this.location.pathname + this.getSearch()
      ).slice(this.root.length - 1);
      return path.charAt(0) === '/' ? path.slice(1) : path;
    },

    // Get the cross-browser normalized URL fragment from the path or hash.
    getFragment: function(fragment) {
      if (fragment == null) {
        if (this._usePushState || !this._wantsHashChange) {
          fragment = this.getPath();
        } else {
          fragment = this.getHash();
        }
      }
      return fragment.replace(routeStripper, '');
    },

    // Start the hash change handling, returning `true` if the current URL matches
    // an existing route, and `false` otherwise.
    start: function(options) {
      if (History.started) throw new Error('Backbone.history has already been started');
      History.started = true;

      // Figure out the initial configuration. Do we need an iframe?
      // Is pushState desired ... is it available?
      this.options          = _.extend({root: '/'}, this.options, options);
      this.root             = this.options.root;
      this._wantsHashChange = this.options.hashChange !== false;
      this._hasHashChange   = 'onhashchange' in window;
      this._useHashChange   = this._wantsHashChange && this._hasHashChange;
      this._wantsPushState  = !!this.options.pushState;
      this._hasPushState    = !!(this.history && this.history.pushState);
      this._usePushState    = this._wantsPushState && this._hasPushState;
      this.fragment         = this.getFragment();

      // Normalize root to always include a leading and trailing slash.
      this.root = ('/' + this.root + '/').replace(rootStripper, '/');

      // Transition from hashChange to pushState or vice versa if both are
      // requested.
      if (this._wantsHashChange && this._wantsPushState) {

        // If we've started off with a route from a `pushState`-enabled
        // browser, but we're currently in a browser that doesn't support it...
        if (!this._hasPushState && !this.atRoot()) {
          var root = this.root.slice(0, -1) || '/';
          this.location.replace(root + '#' + this.getPath());
          // Return immediately as browser will do redirect to new url
          return true;

        // Or if we've started out with a hash-based route, but we're currently
        // in a browser where it could be `pushState`-based instead...
        } else if (this._hasPushState && this.atRoot()) {
          this.navigate(this.getHash(), {replace: true});
        }

      }

      // Proxy an iframe to handle location events if the browser doesn't
      // support the `hashchange` event, HTML5 history, or the user wants
      // `hashChange` but not `pushState`.
      if (!this._hasHashChange && this._wantsHashChange && !this._usePushState) {
        this.iframe = document.createElement('iframe');
        this.iframe.src = 'javascript:0';
        this.iframe.style.display = 'none';
        this.iframe.tabIndex = -1;
        var body = document.body;
        // Using `appendChild` will throw on IE < 9 if the document is not ready.
        var iWindow = body.insertBefore(this.iframe, body.firstChild).contentWindow;
        iWindow.document.open();
        iWindow.document.close();
        iWindow.location.hash = '#' + this.fragment;
      }

      // Add a cross-platform `addEventListener` shim for older browsers.
      var addEventListener = window.addEventListener || function (eventName, listener) {
        return attachEvent('on' + eventName, listener);
      };

      // Depending on whether we're using pushState or hashes, and whether
      // 'onhashchange' is supported, determine how we check the URL state.
      if (this._usePushState) {
        addEventListener('popstate', this.checkUrl, false);
      } else if (this._useHashChange && !this.iframe) {
        addEventListener('hashchange', this.checkUrl, false);
      } else if (this._wantsHashChange) {
        this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
      }

      if (!this.options.silent) return this.loadUrl();
    },

    // Disable Backbone.history, perhaps temporarily. Not useful in a real app,
    // but possibly useful for unit testing Routers.
    stop: function() {
      // Add a cross-platform `removeEventListener` shim for older browsers.
      var removeEventListener = window.removeEventListener || function (eventName, listener) {
        return detachEvent('on' + eventName, listener);
      };

      // Remove window listeners.
      if (this._usePushState) {
        removeEventListener('popstate', this.checkUrl, false);
      } else if (this._useHashChange && !this.iframe) {
        removeEventListener('hashchange', this.checkUrl, false);
      }

      // Clean up the iframe if necessary.
      if (this.iframe) {
        document.body.removeChild(this.iframe);
        this.iframe = null;
      }

      // Some environments will throw when clearing an undefined interval.
      if (this._checkUrlInterval) clearInterval(this._checkUrlInterval);
      History.started = false;
    },

    // Add a route to be tested when the fragment changes. Routes added later
    // may override previous routes.
    route: function(route, callback) {
      this.handlers.unshift({route: route, callback: callback});
    },

    // Checks the current URL to see if it has changed, and if it has,
    // calls `loadUrl`, normalizing across the hidden iframe.
    checkUrl: function(e) {
      var current = this.getFragment();

      // If the user pressed the back button, the iframe's hash will have
      // changed and we should use that for comparison.
      if (current === this.fragment && this.iframe) {
        current = this.getHash(this.iframe.contentWindow);
      }

      if (current === this.fragment) return false;
      if (this.iframe) this.navigate(current);
      this.loadUrl();
    },

    // Attempt to load the current URL fragment. If a route succeeds with a
    // match, returns `true`. If no defined routes matches the fragment,
    // returns `false`.
    loadUrl: function(fragment) {
      // If the root doesn't match, no routes can match either.
      if (!this.matchRoot()) return false;
      fragment = this.fragment = this.getFragment(fragment);
      return _.any(this.handlers, function(handler) {
        if (handler.route.test(fragment)) {
          handler.callback(fragment);
          return true;
        }
      });
    },

    // Save a fragment into the hash history, or replace the URL state if the
    // 'replace' option is passed. You are responsible for properly URL-encoding
    // the fragment in advance.
    //
    // The options object can contain `trigger: true` if you wish to have the
    // route callback be fired (not usually desirable), or `replace: true`, if
    // you wish to modify the current URL without adding an entry to the history.
    navigate: function(fragment, options) {
      if (!History.started) return false;
      if (!options || options === true) options = {trigger: !!options};

      // Normalize the fragment.
      fragment = this.getFragment(fragment || '');

      // Don't include a trailing slash on the root.
      var root = this.root;
      if (fragment === '' || fragment.charAt(0) === '?') {
        root = root.slice(0, -1) || '/';
      }
      var url = root + fragment;

      // Strip the hash and decode for matching.
      fragment = this.decodeFragment(fragment.replace(pathStripper, ''));

      if (this.fragment === fragment) return;
      this.fragment = fragment;

      // If pushState is available, we use it to set the fragment as a real URL.
      if (this._usePushState) {
        this.history[options.replace ? 'replaceState' : 'pushState']({}, document.title, url);

      // If hash changes haven't been explicitly disabled, update the hash
      // fragment to store history.
      } else if (this._wantsHashChange) {
        this._updateHash(this.location, fragment, options.replace);
        if (this.iframe && (fragment !== this.getHash(this.iframe.contentWindow))) {
          var iWindow = this.iframe.contentWindow;

          // Opening and closing the iframe tricks IE7 and earlier to push a
          // history entry on hash-tag change.  When replace is true, we don't
          // want this.
          if (!options.replace) {
            iWindow.document.open();
            iWindow.document.close();
          }

          this._updateHash(iWindow.location, fragment, options.replace);
        }

      // If you've told us that you explicitly don't want fallback hashchange-
      // based history, then `navigate` becomes a page refresh.
      } else {
        return this.location.assign(url);
      }
      if (options.trigger) return this.loadUrl(fragment);
    },

    // Update the hash location, either replacing the current entry, or adding
    // a new one to the browser history.
    _updateHash: function(location, fragment, replace) {
      if (replace) {
        var href = location.href.replace(/(javascript:|#).*$/, '');
        location.replace(href + '#' + fragment);
      } else {
        // Some browsers require that `hash` contains a leading #.
        location.hash = '#' + fragment;
      }
    }

  });

  // Create the default Backbone.history.
  Backbone.history = new History;

  // Helpers
  // -------

  // Helper function to correctly set up the prototype chain for subclasses.
  // Similar to `goog.inherits`, but uses a hash of prototype properties and
  // class properties to be extended.
  var extend = function(protoProps, staticProps) {
    var parent = this;
    var child;

    // The constructor function for the new subclass is either defined by you
    // (the "constructor" property in your `extend` definition), or defaulted
    // by us to simply call the parent constructor.
    if (protoProps && _.has(protoProps, 'constructor')) {
      child = protoProps.constructor;
    } else {
      child = function(){ return parent.apply(this, arguments); };
    }

    // Add static properties to the constructor function, if supplied.
    _.extend(child, parent, staticProps);

    // Set the prototype chain to inherit from `parent`, without calling
    // `parent` constructor function.
    var Surrogate = function(){ this.constructor = child; };
    Surrogate.prototype = parent.prototype;
    child.prototype = new Surrogate;

    // Add prototype properties (instance properties) to the subclass,
    // if supplied.
    if (protoProps) _.extend(child.prototype, protoProps);

    // Set a convenience property in case the parent's prototype is needed
    // later.
    child.__super__ = parent.prototype;

    return child;
  };

  // Set up inheritance for the model, collection, router, view and history.
  Model.extend = Collection.extend = Router.extend = View.extend = History.extend = extend;

  // Throw an error when a URL is needed, and none is supplied.
  var urlError = function() {
    throw new Error('A "url" property or function must be specified');
  };

  // Wrap an optional error callback with a fallback error event.
  var wrapError = function(model, options) {
    var error = options.error;
    options.error = function(resp) {
      if (error) error.call(options.context, model, resp, options);
      model.trigger('error', model, resp, options);
    };
  };

  return Backbone;

}));

/*!

 handlebars v3.0.3

Copyright (C) 2011-2014 by Yehuda Katz

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

@license
*/
(function webpackUniversalModuleDefinition(root, factory) {
	if(typeof exports === 'object' && typeof module === 'object')
		module.exports = factory();
	else if(typeof define === 'function' && define.amd)
		define(factory);
	else if(typeof exports === 'object')
		exports["Handlebars"] = factory();
	else
		root["Handlebars"] = factory();
})(this, function() {
return /******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};

/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {

/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId])
/******/ 			return installedModules[moduleId].exports;

/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			exports: {},
/******/ 			id: moduleId,
/******/ 			loaded: false
/******/ 		};

/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);

/******/ 		// Flag the module as loaded
/******/ 		module.loaded = true;

/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}


/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;

/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;

/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "";

/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;

	var _runtime = __webpack_require__(1);

	var _runtime2 = _interopRequireWildcard(_runtime);

	// Compiler imports

	var _AST = __webpack_require__(2);

	var _AST2 = _interopRequireWildcard(_AST);

	var _Parser$parse = __webpack_require__(3);

	var _Compiler$compile$precompile = __webpack_require__(4);

	var _JavaScriptCompiler = __webpack_require__(5);

	var _JavaScriptCompiler2 = _interopRequireWildcard(_JavaScriptCompiler);

	var _Visitor = __webpack_require__(6);

	var _Visitor2 = _interopRequireWildcard(_Visitor);

	var _noConflict = __webpack_require__(7);

	var _noConflict2 = _interopRequireWildcard(_noConflict);

	var _create = _runtime2['default'].create;
	function create() {
	  var hb = _create();

	  hb.compile = function (input, options) {
	    return _Compiler$compile$precompile.compile(input, options, hb);
	  };
	  hb.precompile = function (input, options) {
	    return _Compiler$compile$precompile.precompile(input, options, hb);
	  };

	  hb.AST = _AST2['default'];
	  hb.Compiler = _Compiler$compile$precompile.Compiler;
	  hb.JavaScriptCompiler = _JavaScriptCompiler2['default'];
	  hb.Parser = _Parser$parse.parser;
	  hb.parse = _Parser$parse.parse;

	  return hb;
	}

	var inst = create();
	inst.create = create;

	_noConflict2['default'](inst);

	inst.Visitor = _Visitor2['default'];

	inst['default'] = inst;

	exports['default'] = inst;
	module.exports = exports['default'];

/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;

	var _import = __webpack_require__(9);

	var base = _interopRequireWildcard(_import);

	// Each of these augment the Handlebars object. No need to setup here.
	// (This is done to easily share code between commonjs and browse envs)

	var _SafeString = __webpack_require__(10);

	var _SafeString2 = _interopRequireWildcard(_SafeString);

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var _import2 = __webpack_require__(12);

	var Utils = _interopRequireWildcard(_import2);

	var _import3 = __webpack_require__(13);

	var runtime = _interopRequireWildcard(_import3);

	var _noConflict = __webpack_require__(7);

	var _noConflict2 = _interopRequireWildcard(_noConflict);

	// For compatibility and usage outside of module systems, make the Handlebars object a namespace
	function create() {
	  var hb = new base.HandlebarsEnvironment();

	  Utils.extend(hb, base);
	  hb.SafeString = _SafeString2['default'];
	  hb.Exception = _Exception2['default'];
	  hb.Utils = Utils;
	  hb.escapeExpression = Utils.escapeExpression;

	  hb.VM = runtime;
	  hb.template = function (spec) {
	    return runtime.template(spec, hb);
	  };

	  return hb;
	}

	var inst = create();
	inst.create = create;

	_noConflict2['default'](inst);

	inst['default'] = inst;

	exports['default'] = inst;
	module.exports = exports['default'];

/***/ },
/* 2 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	exports.__esModule = true;
	var AST = {
	  Program: function Program(statements, blockParams, strip, locInfo) {
	    this.loc = locInfo;
	    this.type = 'Program';
	    this.body = statements;

	    this.blockParams = blockParams;
	    this.strip = strip;
	  },

	  MustacheStatement: function MustacheStatement(path, params, hash, escaped, strip, locInfo) {
	    this.loc = locInfo;
	    this.type = 'MustacheStatement';

	    this.path = path;
	    this.params = params || [];
	    this.hash = hash;
	    this.escaped = escaped;

	    this.strip = strip;
	  },

	  BlockStatement: function BlockStatement(path, params, hash, program, inverse, openStrip, inverseStrip, closeStrip, locInfo) {
	    this.loc = locInfo;
	    this.type = 'BlockStatement';

	    this.path = path;
	    this.params = params || [];
	    this.hash = hash;
	    this.program = program;
	    this.inverse = inverse;

	    this.openStrip = openStrip;
	    this.inverseStrip = inverseStrip;
	    this.closeStrip = closeStrip;
	  },

	  PartialStatement: function PartialStatement(name, params, hash, strip, locInfo) {
	    this.loc = locInfo;
	    this.type = 'PartialStatement';

	    this.name = name;
	    this.params = params || [];
	    this.hash = hash;

	    this.indent = '';
	    this.strip = strip;
	  },

	  ContentStatement: function ContentStatement(string, locInfo) {
	    this.loc = locInfo;
	    this.type = 'ContentStatement';
	    this.original = this.value = string;
	  },

	  CommentStatement: function CommentStatement(comment, strip, locInfo) {
	    this.loc = locInfo;
	    this.type = 'CommentStatement';
	    this.value = comment;

	    this.strip = strip;
	  },

	  SubExpression: function SubExpression(path, params, hash, locInfo) {
	    this.loc = locInfo;

	    this.type = 'SubExpression';
	    this.path = path;
	    this.params = params || [];
	    this.hash = hash;
	  },

	  PathExpression: function PathExpression(data, depth, parts, original, locInfo) {
	    this.loc = locInfo;
	    this.type = 'PathExpression';

	    this.data = data;
	    this.original = original;
	    this.parts = parts;
	    this.depth = depth;
	  },

	  StringLiteral: function StringLiteral(string, locInfo) {
	    this.loc = locInfo;
	    this.type = 'StringLiteral';
	    this.original = this.value = string;
	  },

	  NumberLiteral: function NumberLiteral(number, locInfo) {
	    this.loc = locInfo;
	    this.type = 'NumberLiteral';
	    this.original = this.value = Number(number);
	  },

	  BooleanLiteral: function BooleanLiteral(bool, locInfo) {
	    this.loc = locInfo;
	    this.type = 'BooleanLiteral';
	    this.original = this.value = bool === 'true';
	  },

	  UndefinedLiteral: function UndefinedLiteral(locInfo) {
	    this.loc = locInfo;
	    this.type = 'UndefinedLiteral';
	    this.original = this.value = undefined;
	  },

	  NullLiteral: function NullLiteral(locInfo) {
	    this.loc = locInfo;
	    this.type = 'NullLiteral';
	    this.original = this.value = null;
	  },

	  Hash: function Hash(pairs, locInfo) {
	    this.loc = locInfo;
	    this.type = 'Hash';
	    this.pairs = pairs;
	  },
	  HashPair: function HashPair(key, value, locInfo) {
	    this.loc = locInfo;
	    this.type = 'HashPair';
	    this.key = key;
	    this.value = value;
	  },

	  // Public API used to evaluate derived attributes regarding AST nodes
	  helpers: {
	    // a mustache is definitely a helper if:
	    // * it is an eligible helper, and
	    // * it has at least one parameter or hash segment
	    helperExpression: function helperExpression(node) {
	      return !!(node.type === 'SubExpression' || node.params.length || node.hash);
	    },

	    scopedId: function scopedId(path) {
	      return /^\.|this\b/.test(path.original);
	    },

	    // an ID is simple if it only has one part, and that part is not
	    // `..` or `this`.
	    simpleId: function simpleId(path) {
	      return path.parts.length === 1 && !AST.helpers.scopedId(path) && !path.depth;
	    }
	  }
	};

	// Must be exported as an object rather than the root of the module as the jison lexer
	// must modify the object to operate properly.
	exports['default'] = AST;
	module.exports = exports['default'];

/***/ },
/* 3 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;
	exports.parse = parse;

	var _parser = __webpack_require__(14);

	var _parser2 = _interopRequireWildcard(_parser);

	var _AST = __webpack_require__(2);

	var _AST2 = _interopRequireWildcard(_AST);

	var _WhitespaceControl = __webpack_require__(15);

	var _WhitespaceControl2 = _interopRequireWildcard(_WhitespaceControl);

	var _import = __webpack_require__(16);

	var Helpers = _interopRequireWildcard(_import);

	var _extend = __webpack_require__(12);

	exports.parser = _parser2['default'];

	var yy = {};
	_extend.extend(yy, Helpers, _AST2['default']);

	function parse(input, options) {
	  // Just return if an already-compiled AST was passed in.
	  if (input.type === 'Program') {
	    return input;
	  }

	  _parser2['default'].yy = yy;

	  // Altering the shared object here, but this is ok as parser is a sync operation
	  yy.locInfo = function (locInfo) {
	    return new yy.SourceLocation(options && options.srcName, locInfo);
	  };

	  var strip = new _WhitespaceControl2['default']();
	  return strip.accept(_parser2['default'].parse(input));
	}

/***/ },
/* 4 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;
	exports.Compiler = Compiler;
	exports.precompile = precompile;
	exports.compile = compile;

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var _isArray$indexOf = __webpack_require__(12);

	var _AST = __webpack_require__(2);

	var _AST2 = _interopRequireWildcard(_AST);

	var slice = [].slice;

	function Compiler() {}

	// the foundHelper register will disambiguate helper lookup from finding a
	// function in a context. This is necessary for mustache compatibility, which
	// requires that context functions in blocks are evaluated by blockHelperMissing,
	// and then proceed as if the resulting value was provided to blockHelperMissing.

	Compiler.prototype = {
	  compiler: Compiler,

	  equals: function equals(other) {
	    var len = this.opcodes.length;
	    if (other.opcodes.length !== len) {
	      return false;
	    }

	    for (var i = 0; i < len; i++) {
	      var opcode = this.opcodes[i],
	          otherOpcode = other.opcodes[i];
	      if (opcode.opcode !== otherOpcode.opcode || !argEquals(opcode.args, otherOpcode.args)) {
	        return false;
	      }
	    }

	    // We know that length is the same between the two arrays because they are directly tied
	    // to the opcode behavior above.
	    len = this.children.length;
	    for (var i = 0; i < len; i++) {
	      if (!this.children[i].equals(other.children[i])) {
	        return false;
	      }
	    }

	    return true;
	  },

	  guid: 0,

	  compile: function compile(program, options) {
	    this.sourceNode = [];
	    this.opcodes = [];
	    this.children = [];
	    this.options = options;
	    this.stringParams = options.stringParams;
	    this.trackIds = options.trackIds;

	    options.blockParams = options.blockParams || [];

	    // These changes will propagate to the other compiler components
	    var knownHelpers = options.knownHelpers;
	    options.knownHelpers = {
	      helperMissing: true,
	      blockHelperMissing: true,
	      each: true,
	      'if': true,
	      unless: true,
	      'with': true,
	      log: true,
	      lookup: true
	    };
	    if (knownHelpers) {
	      for (var _name in knownHelpers) {
	        if (_name in knownHelpers) {
	          options.knownHelpers[_name] = knownHelpers[_name];
	        }
	      }
	    }

	    return this.accept(program);
	  },

	  compileProgram: function compileProgram(program) {
	    var childCompiler = new this.compiler(),
	        // eslint-disable-line new-cap
	    result = childCompiler.compile(program, this.options),
	        guid = this.guid++;

	    this.usePartial = this.usePartial || result.usePartial;

	    this.children[guid] = result;
	    this.useDepths = this.useDepths || result.useDepths;

	    return guid;
	  },

	  accept: function accept(node) {
	    this.sourceNode.unshift(node);
	    var ret = this[node.type](node);
	    this.sourceNode.shift();
	    return ret;
	  },

	  Program: function Program(program) {
	    this.options.blockParams.unshift(program.blockParams);

	    var body = program.body,
	        bodyLength = body.length;
	    for (var i = 0; i < bodyLength; i++) {
	      this.accept(body[i]);
	    }

	    this.options.blockParams.shift();

	    this.isSimple = bodyLength === 1;
	    this.blockParams = program.blockParams ? program.blockParams.length : 0;

	    return this;
	  },

	  BlockStatement: function BlockStatement(block) {
	    transformLiteralToPath(block);

	    var program = block.program,
	        inverse = block.inverse;

	    program = program && this.compileProgram(program);
	    inverse = inverse && this.compileProgram(inverse);

	    var type = this.classifySexpr(block);

	    if (type === 'helper') {
	      this.helperSexpr(block, program, inverse);
	    } else if (type === 'simple') {
	      this.simpleSexpr(block);

	      // now that the simple mustache is resolved, we need to
	      // evaluate it by executing `blockHelperMissing`
	      this.opcode('pushProgram', program);
	      this.opcode('pushProgram', inverse);
	      this.opcode('emptyHash');
	      this.opcode('blockValue', block.path.original);
	    } else {
	      this.ambiguousSexpr(block, program, inverse);

	      // now that the simple mustache is resolved, we need to
	      // evaluate it by executing `blockHelperMissing`
	      this.opcode('pushProgram', program);
	      this.opcode('pushProgram', inverse);
	      this.opcode('emptyHash');
	      this.opcode('ambiguousBlockValue');
	    }

	    this.opcode('append');
	  },

	  PartialStatement: function PartialStatement(partial) {
	    this.usePartial = true;

	    var params = partial.params;
	    if (params.length > 1) {
	      throw new _Exception2['default']('Unsupported number of partial arguments: ' + params.length, partial);
	    } else if (!params.length) {
	      params.push({ type: 'PathExpression', parts: [], depth: 0 });
	    }

	    var partialName = partial.name.original,
	        isDynamic = partial.name.type === 'SubExpression';
	    if (isDynamic) {
	      this.accept(partial.name);
	    }

	    this.setupFullMustacheParams(partial, undefined, undefined, true);

	    var indent = partial.indent || '';
	    if (this.options.preventIndent && indent) {
	      this.opcode('appendContent', indent);
	      indent = '';
	    }

	    this.opcode('invokePartial', isDynamic, partialName, indent);
	    this.opcode('append');
	  },

	  MustacheStatement: function MustacheStatement(mustache) {
	    this.SubExpression(mustache); // eslint-disable-line new-cap

	    if (mustache.escaped && !this.options.noEscape) {
	      this.opcode('appendEscaped');
	    } else {
	      this.opcode('append');
	    }
	  },

	  ContentStatement: function ContentStatement(content) {
	    if (content.value) {
	      this.opcode('appendContent', content.value);
	    }
	  },

	  CommentStatement: function CommentStatement() {},

	  SubExpression: function SubExpression(sexpr) {
	    transformLiteralToPath(sexpr);
	    var type = this.classifySexpr(sexpr);

	    if (type === 'simple') {
	      this.simpleSexpr(sexpr);
	    } else if (type === 'helper') {
	      this.helperSexpr(sexpr);
	    } else {
	      this.ambiguousSexpr(sexpr);
	    }
	  },
	  ambiguousSexpr: function ambiguousSexpr(sexpr, program, inverse) {
	    var path = sexpr.path,
	        name = path.parts[0],
	        isBlock = program != null || inverse != null;

	    this.opcode('getContext', path.depth);

	    this.opcode('pushProgram', program);
	    this.opcode('pushProgram', inverse);

	    this.accept(path);

	    this.opcode('invokeAmbiguous', name, isBlock);
	  },

	  simpleSexpr: function simpleSexpr(sexpr) {
	    this.accept(sexpr.path);
	    this.opcode('resolvePossibleLambda');
	  },

	  helperSexpr: function helperSexpr(sexpr, program, inverse) {
	    var params = this.setupFullMustacheParams(sexpr, program, inverse),
	        path = sexpr.path,
	        name = path.parts[0];

	    if (this.options.knownHelpers[name]) {
	      this.opcode('invokeKnownHelper', params.length, name);
	    } else if (this.options.knownHelpersOnly) {
	      throw new _Exception2['default']('You specified knownHelpersOnly, but used the unknown helper ' + name, sexpr);
	    } else {
	      path.falsy = true;

	      this.accept(path);
	      this.opcode('invokeHelper', params.length, path.original, _AST2['default'].helpers.simpleId(path));
	    }
	  },

	  PathExpression: function PathExpression(path) {
	    this.addDepth(path.depth);
	    this.opcode('getContext', path.depth);

	    var name = path.parts[0],
	        scoped = _AST2['default'].helpers.scopedId(path),
	        blockParamId = !path.depth && !scoped && this.blockParamIndex(name);

	    if (blockParamId) {
	      this.opcode('lookupBlockParam', blockParamId, path.parts);
	    } else if (!name) {
	      // Context reference, i.e. `{{foo .}}` or `{{foo ..}}`
	      this.opcode('pushContext');
	    } else if (path.data) {
	      this.options.data = true;
	      this.opcode('lookupData', path.depth, path.parts);
	    } else {
	      this.opcode('lookupOnContext', path.parts, path.falsy, scoped);
	    }
	  },

	  StringLiteral: function StringLiteral(string) {
	    this.opcode('pushString', string.value);
	  },

	  NumberLiteral: function NumberLiteral(number) {
	    this.opcode('pushLiteral', number.value);
	  },

	  BooleanLiteral: function BooleanLiteral(bool) {
	    this.opcode('pushLiteral', bool.value);
	  },

	  UndefinedLiteral: function UndefinedLiteral() {
	    this.opcode('pushLiteral', 'undefined');
	  },

	  NullLiteral: function NullLiteral() {
	    this.opcode('pushLiteral', 'null');
	  },

	  Hash: function Hash(hash) {
	    var pairs = hash.pairs,
	        i = 0,
	        l = pairs.length;

	    this.opcode('pushHash');

	    for (; i < l; i++) {
	      this.pushParam(pairs[i].value);
	    }
	    while (i--) {
	      this.opcode('assignToHash', pairs[i].key);
	    }
	    this.opcode('popHash');
	  },

	  // HELPERS
	  opcode: function opcode(name) {
	    this.opcodes.push({ opcode: name, args: slice.call(arguments, 1), loc: this.sourceNode[0].loc });
	  },

	  addDepth: function addDepth(depth) {
	    if (!depth) {
	      return;
	    }

	    this.useDepths = true;
	  },

	  classifySexpr: function classifySexpr(sexpr) {
	    var isSimple = _AST2['default'].helpers.simpleId(sexpr.path);

	    var isBlockParam = isSimple && !!this.blockParamIndex(sexpr.path.parts[0]);

	    // a mustache is an eligible helper if:
	    // * its id is simple (a single part, not `this` or `..`)
	    var isHelper = !isBlockParam && _AST2['default'].helpers.helperExpression(sexpr);

	    // if a mustache is an eligible helper but not a definite
	    // helper, it is ambiguous, and will be resolved in a later
	    // pass or at runtime.
	    var isEligible = !isBlockParam && (isHelper || isSimple);

	    // if ambiguous, we can possibly resolve the ambiguity now
	    // An eligible helper is one that does not have a complex path, i.e. `this.foo`, `../foo` etc.
	    if (isEligible && !isHelper) {
	      var _name2 = sexpr.path.parts[0],
	          options = this.options;

	      if (options.knownHelpers[_name2]) {
	        isHelper = true;
	      } else if (options.knownHelpersOnly) {
	        isEligible = false;
	      }
	    }

	    if (isHelper) {
	      return 'helper';
	    } else if (isEligible) {
	      return 'ambiguous';
	    } else {
	      return 'simple';
	    }
	  },

	  pushParams: function pushParams(params) {
	    for (var i = 0, l = params.length; i < l; i++) {
	      this.pushParam(params[i]);
	    }
	  },

	  pushParam: function pushParam(val) {
	    var value = val.value != null ? val.value : val.original || '';

	    if (this.stringParams) {
	      if (value.replace) {
	        value = value.replace(/^(\.?\.\/)*/g, '').replace(/\//g, '.');
	      }

	      if (val.depth) {
	        this.addDepth(val.depth);
	      }
	      this.opcode('getContext', val.depth || 0);
	      this.opcode('pushStringParam', value, val.type);

	      if (val.type === 'SubExpression') {
	        // SubExpressions get evaluated and passed in
	        // in string params mode.
	        this.accept(val);
	      }
	    } else {
	      if (this.trackIds) {
	        var blockParamIndex = undefined;
	        if (val.parts && !_AST2['default'].helpers.scopedId(val) && !val.depth) {
	          blockParamIndex = this.blockParamIndex(val.parts[0]);
	        }
	        if (blockParamIndex) {
	          var blockParamChild = val.parts.slice(1).join('.');
	          this.opcode('pushId', 'BlockParam', blockParamIndex, blockParamChild);
	        } else {
	          value = val.original || value;
	          if (value.replace) {
	            value = value.replace(/^\.\//g, '').replace(/^\.$/g, '');
	          }

	          this.opcode('pushId', val.type, value);
	        }
	      }
	      this.accept(val);
	    }
	  },

	  setupFullMustacheParams: function setupFullMustacheParams(sexpr, program, inverse, omitEmpty) {
	    var params = sexpr.params;
	    this.pushParams(params);

	    this.opcode('pushProgram', program);
	    this.opcode('pushProgram', inverse);

	    if (sexpr.hash) {
	      this.accept(sexpr.hash);
	    } else {
	      this.opcode('emptyHash', omitEmpty);
	    }

	    return params;
	  },

	  blockParamIndex: function blockParamIndex(name) {
	    for (var depth = 0, len = this.options.blockParams.length; depth < len; depth++) {
	      var blockParams = this.options.blockParams[depth],
	          param = blockParams && _isArray$indexOf.indexOf(blockParams, name);
	      if (blockParams && param >= 0) {
	        return [depth, param];
	      }
	    }
	  }
	};

	function precompile(input, options, env) {
	  if (input == null || typeof input !== 'string' && input.type !== 'Program') {
	    throw new _Exception2['default']('You must pass a string or Handlebars AST to Handlebars.precompile. You passed ' + input);
	  }

	  options = options || {};
	  if (!('data' in options)) {
	    options.data = true;
	  }
	  if (options.compat) {
	    options.useDepths = true;
	  }

	  var ast = env.parse(input, options),
	      environment = new env.Compiler().compile(ast, options);
	  return new env.JavaScriptCompiler().compile(environment, options);
	}

	function compile(input, _x, env) {
	  var options = arguments[1] === undefined ? {} : arguments[1];

	  if (input == null || typeof input !== 'string' && input.type !== 'Program') {
	    throw new _Exception2['default']('You must pass a string or Handlebars AST to Handlebars.compile. You passed ' + input);
	  }

	  if (!('data' in options)) {
	    options.data = true;
	  }
	  if (options.compat) {
	    options.useDepths = true;
	  }

	  var compiled = undefined;

	  function compileInput() {
	    var ast = env.parse(input, options),
	        environment = new env.Compiler().compile(ast, options),
	        templateSpec = new env.JavaScriptCompiler().compile(environment, options, undefined, true);
	    return env.template(templateSpec);
	  }

	  // Template is only compiled on first use and cached after that point.
	  function ret(context, execOptions) {
	    if (!compiled) {
	      compiled = compileInput();
	    }
	    return compiled.call(this, context, execOptions);
	  }
	  ret._setup = function (setupOptions) {
	    if (!compiled) {
	      compiled = compileInput();
	    }
	    return compiled._setup(setupOptions);
	  };
	  ret._child = function (i, data, blockParams, depths) {
	    if (!compiled) {
	      compiled = compileInput();
	    }
	    return compiled._child(i, data, blockParams, depths);
	  };
	  return ret;
	}

	function argEquals(a, b) {
	  if (a === b) {
	    return true;
	  }

	  if (_isArray$indexOf.isArray(a) && _isArray$indexOf.isArray(b) && a.length === b.length) {
	    for (var i = 0; i < a.length; i++) {
	      if (!argEquals(a[i], b[i])) {
	        return false;
	      }
	    }
	    return true;
	  }
	}

	function transformLiteralToPath(sexpr) {
	  if (!sexpr.path.parts) {
	    var literal = sexpr.path;
	    // Casting to string here to make false and 0 literal values play nicely with the rest
	    // of the system.
	    sexpr.path = new _AST2['default'].PathExpression(false, 0, [literal.original + ''], literal.original + '', literal.loc);
	  }
	}

/***/ },
/* 5 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;

	var _COMPILER_REVISION$REVISION_CHANGES = __webpack_require__(9);

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var _isArray = __webpack_require__(12);

	var _CodeGen = __webpack_require__(17);

	var _CodeGen2 = _interopRequireWildcard(_CodeGen);

	function Literal(value) {
	  this.value = value;
	}

	function JavaScriptCompiler() {}

	JavaScriptCompiler.prototype = {
	  // PUBLIC API: You can override these methods in a subclass to provide
	  // alternative compiled forms for name lookup and buffering semantics
	  nameLookup: function nameLookup(parent, name /* , type*/) {
	    if (JavaScriptCompiler.isValidJavaScriptVariableName(name)) {
	      return [parent, '.', name];
	    } else {
	      return [parent, '[\'', name, '\']'];
	    }
	  },
	  depthedLookup: function depthedLookup(name) {
	    return [this.aliasable('this.lookup'), '(depths, "', name, '")'];
	  },

	  compilerInfo: function compilerInfo() {
	    var revision = _COMPILER_REVISION$REVISION_CHANGES.COMPILER_REVISION,
	        versions = _COMPILER_REVISION$REVISION_CHANGES.REVISION_CHANGES[revision];
	    return [revision, versions];
	  },

	  appendToBuffer: function appendToBuffer(source, location, explicit) {
	    // Force a source as this simplifies the merge logic.
	    if (!_isArray.isArray(source)) {
	      source = [source];
	    }
	    source = this.source.wrap(source, location);

	    if (this.environment.isSimple) {
	      return ['return ', source, ';'];
	    } else if (explicit) {
	      // This is a case where the buffer operation occurs as a child of another
	      // construct, generally braces. We have to explicitly output these buffer
	      // operations to ensure that the emitted code goes in the correct location.
	      return ['buffer += ', source, ';'];
	    } else {
	      source.appendToBuffer = true;
	      return source;
	    }
	  },

	  initializeBuffer: function initializeBuffer() {
	    return this.quotedString('');
	  },
	  // END PUBLIC API

	  compile: function compile(environment, options, context, asObject) {
	    this.environment = environment;
	    this.options = options;
	    this.stringParams = this.options.stringParams;
	    this.trackIds = this.options.trackIds;
	    this.precompile = !asObject;

	    this.name = this.environment.name;
	    this.isChild = !!context;
	    this.context = context || {
	      programs: [],
	      environments: []
	    };

	    this.preamble();

	    this.stackSlot = 0;
	    this.stackVars = [];
	    this.aliases = {};
	    this.registers = { list: [] };
	    this.hashes = [];
	    this.compileStack = [];
	    this.inlineStack = [];
	    this.blockParams = [];

	    this.compileChildren(environment, options);

	    this.useDepths = this.useDepths || environment.useDepths || this.options.compat;
	    this.useBlockParams = this.useBlockParams || environment.useBlockParams;

	    var opcodes = environment.opcodes,
	        opcode = undefined,
	        firstLoc = undefined,
	        i = undefined,
	        l = undefined;

	    for (i = 0, l = opcodes.length; i < l; i++) {
	      opcode = opcodes[i];

	      this.source.currentLocation = opcode.loc;
	      firstLoc = firstLoc || opcode.loc;
	      this[opcode.opcode].apply(this, opcode.args);
	    }

	    // Flush any trailing content that might be pending.
	    this.source.currentLocation = firstLoc;
	    this.pushSource('');

	    /* istanbul ignore next */
	    if (this.stackSlot || this.inlineStack.length || this.compileStack.length) {
	      throw new _Exception2['default']('Compile completed with content left on stack');
	    }

	    var fn = this.createFunctionContext(asObject);
	    if (!this.isChild) {
	      var ret = {
	        compiler: this.compilerInfo(),
	        main: fn
	      };
	      var programs = this.context.programs;
	      for (i = 0, l = programs.length; i < l; i++) {
	        if (programs[i]) {
	          ret[i] = programs[i];
	        }
	      }

	      if (this.environment.usePartial) {
	        ret.usePartial = true;
	      }
	      if (this.options.data) {
	        ret.useData = true;
	      }
	      if (this.useDepths) {
	        ret.useDepths = true;
	      }
	      if (this.useBlockParams) {
	        ret.useBlockParams = true;
	      }
	      if (this.options.compat) {
	        ret.compat = true;
	      }

	      if (!asObject) {
	        ret.compiler = JSON.stringify(ret.compiler);

	        this.source.currentLocation = { start: { line: 1, column: 0 } };
	        ret = this.objectLiteral(ret);

	        if (options.srcName) {
	          ret = ret.toStringWithSourceMap({ file: options.destName });
	          ret.map = ret.map && ret.map.toString();
	        } else {
	          ret = ret.toString();
	        }
	      } else {
	        ret.compilerOptions = this.options;
	      }

	      return ret;
	    } else {
	      return fn;
	    }
	  },

	  preamble: function preamble() {
	    // track the last context pushed into place to allow skipping the
	    // getContext opcode when it would be a noop
	    this.lastContext = 0;
	    this.source = new _CodeGen2['default'](this.options.srcName);
	  },

	  createFunctionContext: function createFunctionContext(asObject) {
	    var varDeclarations = '';

	    var locals = this.stackVars.concat(this.registers.list);
	    if (locals.length > 0) {
	      varDeclarations += ', ' + locals.join(', ');
	    }

	    // Generate minimizer alias mappings
	    //
	    // When using true SourceNodes, this will update all references to the given alias
	    // as the source nodes are reused in situ. For the non-source node compilation mode,
	    // aliases will not be used, but this case is already being run on the client and
	    // we aren't concern about minimizing the template size.
	    var aliasCount = 0;
	    for (var alias in this.aliases) {
	      // eslint-disable-line guard-for-in
	      var node = this.aliases[alias];

	      if (this.aliases.hasOwnProperty(alias) && node.children && node.referenceCount > 1) {
	        varDeclarations += ', alias' + ++aliasCount + '=' + alias;
	        node.children[0] = 'alias' + aliasCount;
	      }
	    }

	    var params = ['depth0', 'helpers', 'partials', 'data'];

	    if (this.useBlockParams || this.useDepths) {
	      params.push('blockParams');
	    }
	    if (this.useDepths) {
	      params.push('depths');
	    }

	    // Perform a second pass over the output to merge content when possible
	    var source = this.mergeSource(varDeclarations);

	    if (asObject) {
	      params.push(source);

	      return Function.apply(this, params);
	    } else {
	      return this.source.wrap(['function(', params.join(','), ') {\n  ', source, '}']);
	    }
	  },
	  mergeSource: function mergeSource(varDeclarations) {
	    var isSimple = this.environment.isSimple,
	        appendOnly = !this.forceBuffer,
	        appendFirst = undefined,
	        sourceSeen = undefined,
	        bufferStart = undefined,
	        bufferEnd = undefined;
	    this.source.each(function (line) {
	      if (line.appendToBuffer) {
	        if (bufferStart) {
	          line.prepend('  + ');
	        } else {
	          bufferStart = line;
	        }
	        bufferEnd = line;
	      } else {
	        if (bufferStart) {
	          if (!sourceSeen) {
	            appendFirst = true;
	          } else {
	            bufferStart.prepend('buffer += ');
	          }
	          bufferEnd.add(';');
	          bufferStart = bufferEnd = undefined;
	        }

	        sourceSeen = true;
	        if (!isSimple) {
	          appendOnly = false;
	        }
	      }
	    });

	    if (appendOnly) {
	      if (bufferStart) {
	        bufferStart.prepend('return ');
	        bufferEnd.add(';');
	      } else if (!sourceSeen) {
	        this.source.push('return "";');
	      }
	    } else {
	      varDeclarations += ', buffer = ' + (appendFirst ? '' : this.initializeBuffer());

	      if (bufferStart) {
	        bufferStart.prepend('return buffer + ');
	        bufferEnd.add(';');
	      } else {
	        this.source.push('return buffer;');
	      }
	    }

	    if (varDeclarations) {
	      this.source.prepend('var ' + varDeclarations.substring(2) + (appendFirst ? '' : ';\n'));
	    }

	    return this.source.merge();
	  },

	  // [blockValue]
	  //
	  // On stack, before: hash, inverse, program, value
	  // On stack, after: return value of blockHelperMissing
	  //
	  // The purpose of this opcode is to take a block of the form
	  // `{{#this.foo}}...{{/this.foo}}`, resolve the value of `foo`, and
	  // replace it on the stack with the result of properly
	  // invoking blockHelperMissing.
	  blockValue: function blockValue(name) {
	    var blockHelperMissing = this.aliasable('helpers.blockHelperMissing'),
	        params = [this.contextName(0)];
	    this.setupHelperArgs(name, 0, params);

	    var blockName = this.popStack();
	    params.splice(1, 0, blockName);

	    this.push(this.source.functionCall(blockHelperMissing, 'call', params));
	  },

	  // [ambiguousBlockValue]
	  //
	  // On stack, before: hash, inverse, program, value
	  // Compiler value, before: lastHelper=value of last found helper, if any
	  // On stack, after, if no lastHelper: same as [blockValue]
	  // On stack, after, if lastHelper: value
	  ambiguousBlockValue: function ambiguousBlockValue() {
	    // We're being a bit cheeky and reusing the options value from the prior exec
	    var blockHelperMissing = this.aliasable('helpers.blockHelperMissing'),
	        params = [this.contextName(0)];
	    this.setupHelperArgs('', 0, params, true);

	    this.flushInline();

	    var current = this.topStack();
	    params.splice(1, 0, current);

	    this.pushSource(['if (!', this.lastHelper, ') { ', current, ' = ', this.source.functionCall(blockHelperMissing, 'call', params), '}']);
	  },

	  // [appendContent]
	  //
	  // On stack, before: ...
	  // On stack, after: ...
	  //
	  // Appends the string value of `content` to the current buffer
	  appendContent: function appendContent(content) {
	    if (this.pendingContent) {
	      content = this.pendingContent + content;
	    } else {
	      this.pendingLocation = this.source.currentLocation;
	    }

	    this.pendingContent = content;
	  },

	  // [append]
	  //
	  // On stack, before: value, ...
	  // On stack, after: ...
	  //
	  // Coerces `value` to a String and appends it to the current buffer.
	  //
	  // If `value` is truthy, or 0, it is coerced into a string and appended
	  // Otherwise, the empty string is appended
	  append: function append() {
	    if (this.isInline()) {
	      this.replaceStack(function (current) {
	        return [' != null ? ', current, ' : ""'];
	      });

	      this.pushSource(this.appendToBuffer(this.popStack()));
	    } else {
	      var local = this.popStack();
	      this.pushSource(['if (', local, ' != null) { ', this.appendToBuffer(local, undefined, true), ' }']);
	      if (this.environment.isSimple) {
	        this.pushSource(['else { ', this.appendToBuffer('\'\'', undefined, true), ' }']);
	      }
	    }
	  },

	  // [appendEscaped]
	  //
	  // On stack, before: value, ...
	  // On stack, after: ...
	  //
	  // Escape `value` and append it to the buffer
	  appendEscaped: function appendEscaped() {
	    this.pushSource(this.appendToBuffer([this.aliasable('this.escapeExpression'), '(', this.popStack(), ')']));
	  },

	  // [getContext]
	  //
	  // On stack, before: ...
	  // On stack, after: ...
	  // Compiler value, after: lastContext=depth
	  //
	  // Set the value of the `lastContext` compiler value to the depth
	  getContext: function getContext(depth) {
	    this.lastContext = depth;
	  },

	  // [pushContext]
	  //
	  // On stack, before: ...
	  // On stack, after: currentContext, ...
	  //
	  // Pushes the value of the current context onto the stack.
	  pushContext: function pushContext() {
	    this.pushStackLiteral(this.contextName(this.lastContext));
	  },

	  // [lookupOnContext]
	  //
	  // On stack, before: ...
	  // On stack, after: currentContext[name], ...
	  //
	  // Looks up the value of `name` on the current context and pushes
	  // it onto the stack.
	  lookupOnContext: function lookupOnContext(parts, falsy, scoped) {
	    var i = 0;

	    if (!scoped && this.options.compat && !this.lastContext) {
	      // The depthed query is expected to handle the undefined logic for the root level that
	      // is implemented below, so we evaluate that directly in compat mode
	      this.push(this.depthedLookup(parts[i++]));
	    } else {
	      this.pushContext();
	    }

	    this.resolvePath('context', parts, i, falsy);
	  },

	  // [lookupBlockParam]
	  //
	  // On stack, before: ...
	  // On stack, after: blockParam[name], ...
	  //
	  // Looks up the value of `parts` on the given block param and pushes
	  // it onto the stack.
	  lookupBlockParam: function lookupBlockParam(blockParamId, parts) {
	    this.useBlockParams = true;

	    this.push(['blockParams[', blockParamId[0], '][', blockParamId[1], ']']);
	    this.resolvePath('context', parts, 1);
	  },

	  // [lookupData]
	  //
	  // On stack, before: ...
	  // On stack, after: data, ...
	  //
	  // Push the data lookup operator
	  lookupData: function lookupData(depth, parts) {
	    if (!depth) {
	      this.pushStackLiteral('data');
	    } else {
	      this.pushStackLiteral('this.data(data, ' + depth + ')');
	    }

	    this.resolvePath('data', parts, 0, true);
	  },

	  resolvePath: function resolvePath(type, parts, i, falsy) {
	    var _this = this;

	    if (this.options.strict || this.options.assumeObjects) {
	      this.push(strictLookup(this.options.strict, this, parts, type));
	      return;
	    }

	    var len = parts.length;
	    for (; i < len; i++) {
	      /*eslint-disable no-loop-func */
	      this.replaceStack(function (current) {
	        var lookup = _this.nameLookup(current, parts[i], type);
	        // We want to ensure that zero and false are handled properly if the context (falsy flag)
	        // needs to have the special handling for these values.
	        if (!falsy) {
	          return [' != null ? ', lookup, ' : ', current];
	        } else {
	          // Otherwise we can use generic falsy handling
	          return [' && ', lookup];
	        }
	      });
	      /*eslint-enable no-loop-func */
	    }
	  },

	  // [resolvePossibleLambda]
	  //
	  // On stack, before: value, ...
	  // On stack, after: resolved value, ...
	  //
	  // If the `value` is a lambda, replace it on the stack by
	  // the return value of the lambda
	  resolvePossibleLambda: function resolvePossibleLambda() {
	    this.push([this.aliasable('this.lambda'), '(', this.popStack(), ', ', this.contextName(0), ')']);
	  },

	  // [pushStringParam]
	  //
	  // On stack, before: ...
	  // On stack, after: string, currentContext, ...
	  //
	  // This opcode is designed for use in string mode, which
	  // provides the string value of a parameter along with its
	  // depth rather than resolving it immediately.
	  pushStringParam: function pushStringParam(string, type) {
	    this.pushContext();
	    this.pushString(type);

	    // If it's a subexpression, the string result
	    // will be pushed after this opcode.
	    if (type !== 'SubExpression') {
	      if (typeof string === 'string') {
	        this.pushString(string);
	      } else {
	        this.pushStackLiteral(string);
	      }
	    }
	  },

	  emptyHash: function emptyHash(omitEmpty) {
	    if (this.trackIds) {
	      this.push('{}'); // hashIds
	    }
	    if (this.stringParams) {
	      this.push('{}'); // hashContexts
	      this.push('{}'); // hashTypes
	    }
	    this.pushStackLiteral(omitEmpty ? 'undefined' : '{}');
	  },
	  pushHash: function pushHash() {
	    if (this.hash) {
	      this.hashes.push(this.hash);
	    }
	    this.hash = { values: [], types: [], contexts: [], ids: [] };
	  },
	  popHash: function popHash() {
	    var hash = this.hash;
	    this.hash = this.hashes.pop();

	    if (this.trackIds) {
	      this.push(this.objectLiteral(hash.ids));
	    }
	    if (this.stringParams) {
	      this.push(this.objectLiteral(hash.contexts));
	      this.push(this.objectLiteral(hash.types));
	    }

	    this.push(this.objectLiteral(hash.values));
	  },

	  // [pushString]
	  //
	  // On stack, before: ...
	  // On stack, after: quotedString(string), ...
	  //
	  // Push a quoted version of `string` onto the stack
	  pushString: function pushString(string) {
	    this.pushStackLiteral(this.quotedString(string));
	  },

	  // [pushLiteral]
	  //
	  // On stack, before: ...
	  // On stack, after: value, ...
	  //
	  // Pushes a value onto the stack. This operation prevents
	  // the compiler from creating a temporary variable to hold
	  // it.
	  pushLiteral: function pushLiteral(value) {
	    this.pushStackLiteral(value);
	  },

	  // [pushProgram]
	  //
	  // On stack, before: ...
	  // On stack, after: program(guid), ...
	  //
	  // Push a program expression onto the stack. This takes
	  // a compile-time guid and converts it into a runtime-accessible
	  // expression.
	  pushProgram: function pushProgram(guid) {
	    if (guid != null) {
	      this.pushStackLiteral(this.programExpression(guid));
	    } else {
	      this.pushStackLiteral(null);
	    }
	  },

	  // [invokeHelper]
	  //
	  // On stack, before: hash, inverse, program, params..., ...
	  // On stack, after: result of helper invocation
	  //
	  // Pops off the helper's parameters, invokes the helper,
	  // and pushes the helper's return value onto the stack.
	  //
	  // If the helper is not found, `helperMissing` is called.
	  invokeHelper: function invokeHelper(paramSize, name, isSimple) {
	    var nonHelper = this.popStack(),
	        helper = this.setupHelper(paramSize, name),
	        simple = isSimple ? [helper.name, ' || '] : '';

	    var lookup = ['('].concat(simple, nonHelper);
	    if (!this.options.strict) {
	      lookup.push(' || ', this.aliasable('helpers.helperMissing'));
	    }
	    lookup.push(')');

	    this.push(this.source.functionCall(lookup, 'call', helper.callParams));
	  },

	  // [invokeKnownHelper]
	  //
	  // On stack, before: hash, inverse, program, params..., ...
	  // On stack, after: result of helper invocation
	  //
	  // This operation is used when the helper is known to exist,
	  // so a `helperMissing` fallback is not required.
	  invokeKnownHelper: function invokeKnownHelper(paramSize, name) {
	    var helper = this.setupHelper(paramSize, name);
	    this.push(this.source.functionCall(helper.name, 'call', helper.callParams));
	  },

	  // [invokeAmbiguous]
	  //
	  // On stack, before: hash, inverse, program, params..., ...
	  // On stack, after: result of disambiguation
	  //
	  // This operation is used when an expression like `{{foo}}`
	  // is provided, but we don't know at compile-time whether it
	  // is a helper or a path.
	  //
	  // This operation emits more code than the other options,
	  // and can be avoided by passing the `knownHelpers` and
	  // `knownHelpersOnly` flags at compile-time.
	  invokeAmbiguous: function invokeAmbiguous(name, helperCall) {
	    this.useRegister('helper');

	    var nonHelper = this.popStack();

	    this.emptyHash();
	    var helper = this.setupHelper(0, name, helperCall);

	    var helperName = this.lastHelper = this.nameLookup('helpers', name, 'helper');

	    var lookup = ['(', '(helper = ', helperName, ' || ', nonHelper, ')'];
	    if (!this.options.strict) {
	      lookup[0] = '(helper = ';
	      lookup.push(' != null ? helper : ', this.aliasable('helpers.helperMissing'));
	    }

	    this.push(['(', lookup, helper.paramsInit ? ['),(', helper.paramsInit] : [], '),', '(typeof helper === ', this.aliasable('"function"'), ' ? ', this.source.functionCall('helper', 'call', helper.callParams), ' : helper))']);
	  },

	  // [invokePartial]
	  //
	  // On stack, before: context, ...
	  // On stack after: result of partial invocation
	  //
	  // This operation pops off a context, invokes a partial with that context,
	  // and pushes the result of the invocation back.
	  invokePartial: function invokePartial(isDynamic, name, indent) {
	    var params = [],
	        options = this.setupParams(name, 1, params, false);

	    if (isDynamic) {
	      name = this.popStack();
	      delete options.name;
	    }

	    if (indent) {
	      options.indent = JSON.stringify(indent);
	    }
	    options.helpers = 'helpers';
	    options.partials = 'partials';

	    if (!isDynamic) {
	      params.unshift(this.nameLookup('partials', name, 'partial'));
	    } else {
	      params.unshift(name);
	    }

	    if (this.options.compat) {
	      options.depths = 'depths';
	    }
	    options = this.objectLiteral(options);
	    params.push(options);

	    this.push(this.source.functionCall('this.invokePartial', '', params));
	  },

	  // [assignToHash]
	  //
	  // On stack, before: value, ..., hash, ...
	  // On stack, after: ..., hash, ...
	  //
	  // Pops a value off the stack and assigns it to the current hash
	  assignToHash: function assignToHash(key) {
	    var value = this.popStack(),
	        context = undefined,
	        type = undefined,
	        id = undefined;

	    if (this.trackIds) {
	      id = this.popStack();
	    }
	    if (this.stringParams) {
	      type = this.popStack();
	      context = this.popStack();
	    }

	    var hash = this.hash;
	    if (context) {
	      hash.contexts[key] = context;
	    }
	    if (type) {
	      hash.types[key] = type;
	    }
	    if (id) {
	      hash.ids[key] = id;
	    }
	    hash.values[key] = value;
	  },

	  pushId: function pushId(type, name, child) {
	    if (type === 'BlockParam') {
	      this.pushStackLiteral('blockParams[' + name[0] + '].path[' + name[1] + ']' + (child ? ' + ' + JSON.stringify('.' + child) : ''));
	    } else if (type === 'PathExpression') {
	      this.pushString(name);
	    } else if (type === 'SubExpression') {
	      this.pushStackLiteral('true');
	    } else {
	      this.pushStackLiteral('null');
	    }
	  },

	  // HELPERS

	  compiler: JavaScriptCompiler,

	  compileChildren: function compileChildren(environment, options) {
	    var children = environment.children,
	        child = undefined,
	        compiler = undefined;

	    for (var i = 0, l = children.length; i < l; i++) {
	      child = children[i];
	      compiler = new this.compiler(); // eslint-disable-line new-cap

	      var index = this.matchExistingProgram(child);

	      if (index == null) {
	        this.context.programs.push(''); // Placeholder to prevent name conflicts for nested children
	        index = this.context.programs.length;
	        child.index = index;
	        child.name = 'program' + index;
	        this.context.programs[index] = compiler.compile(child, options, this.context, !this.precompile);
	        this.context.environments[index] = child;

	        this.useDepths = this.useDepths || compiler.useDepths;
	        this.useBlockParams = this.useBlockParams || compiler.useBlockParams;
	      } else {
	        child.index = index;
	        child.name = 'program' + index;

	        this.useDepths = this.useDepths || child.useDepths;
	        this.useBlockParams = this.useBlockParams || child.useBlockParams;
	      }
	    }
	  },
	  matchExistingProgram: function matchExistingProgram(child) {
	    for (var i = 0, len = this.context.environments.length; i < len; i++) {
	      var environment = this.context.environments[i];
	      if (environment && environment.equals(child)) {
	        return i;
	      }
	    }
	  },

	  programExpression: function programExpression(guid) {
	    var child = this.environment.children[guid],
	        programParams = [child.index, 'data', child.blockParams];

	    if (this.useBlockParams || this.useDepths) {
	      programParams.push('blockParams');
	    }
	    if (this.useDepths) {
	      programParams.push('depths');
	    }

	    return 'this.program(' + programParams.join(', ') + ')';
	  },

	  useRegister: function useRegister(name) {
	    if (!this.registers[name]) {
	      this.registers[name] = true;
	      this.registers.list.push(name);
	    }
	  },

	  push: function push(expr) {
	    if (!(expr instanceof Literal)) {
	      expr = this.source.wrap(expr);
	    }

	    this.inlineStack.push(expr);
	    return expr;
	  },

	  pushStackLiteral: function pushStackLiteral(item) {
	    this.push(new Literal(item));
	  },

	  pushSource: function pushSource(source) {
	    if (this.pendingContent) {
	      this.source.push(this.appendToBuffer(this.source.quotedString(this.pendingContent), this.pendingLocation));
	      this.pendingContent = undefined;
	    }

	    if (source) {
	      this.source.push(source);
	    }
	  },

	  replaceStack: function replaceStack(callback) {
	    var prefix = ['('],
	        stack = undefined,
	        createdStack = undefined,
	        usedLiteral = undefined;

	    /* istanbul ignore next */
	    if (!this.isInline()) {
	      throw new _Exception2['default']('replaceStack on non-inline');
	    }

	    // We want to merge the inline statement into the replacement statement via ','
	    var top = this.popStack(true);

	    if (top instanceof Literal) {
	      // Literals do not need to be inlined
	      stack = [top.value];
	      prefix = ['(', stack];
	      usedLiteral = true;
	    } else {
	      // Get or create the current stack name for use by the inline
	      createdStack = true;
	      var _name = this.incrStack();

	      prefix = ['((', this.push(_name), ' = ', top, ')'];
	      stack = this.topStack();
	    }

	    var item = callback.call(this, stack);

	    if (!usedLiteral) {
	      this.popStack();
	    }
	    if (createdStack) {
	      this.stackSlot--;
	    }
	    this.push(prefix.concat(item, ')'));
	  },

	  incrStack: function incrStack() {
	    this.stackSlot++;
	    if (this.stackSlot > this.stackVars.length) {
	      this.stackVars.push('stack' + this.stackSlot);
	    }
	    return this.topStackName();
	  },
	  topStackName: function topStackName() {
	    return 'stack' + this.stackSlot;
	  },
	  flushInline: function flushInline() {
	    var inlineStack = this.inlineStack;
	    this.inlineStack = [];
	    for (var i = 0, len = inlineStack.length; i < len; i++) {
	      var entry = inlineStack[i];
	      /* istanbul ignore if */
	      if (entry instanceof Literal) {
	        this.compileStack.push(entry);
	      } else {
	        var stack = this.incrStack();
	        this.pushSource([stack, ' = ', entry, ';']);
	        this.compileStack.push(stack);
	      }
	    }
	  },
	  isInline: function isInline() {
	    return this.inlineStack.length;
	  },

	  popStack: function popStack(wrapped) {
	    var inline = this.isInline(),
	        item = (inline ? this.inlineStack : this.compileStack).pop();

	    if (!wrapped && item instanceof Literal) {
	      return item.value;
	    } else {
	      if (!inline) {
	        /* istanbul ignore next */
	        if (!this.stackSlot) {
	          throw new _Exception2['default']('Invalid stack pop');
	        }
	        this.stackSlot--;
	      }
	      return item;
	    }
	  },

	  topStack: function topStack() {
	    var stack = this.isInline() ? this.inlineStack : this.compileStack,
	        item = stack[stack.length - 1];

	    /* istanbul ignore if */
	    if (item instanceof Literal) {
	      return item.value;
	    } else {
	      return item;
	    }
	  },

	  contextName: function contextName(context) {
	    if (this.useDepths && context) {
	      return 'depths[' + context + ']';
	    } else {
	      return 'depth' + context;
	    }
	  },

	  quotedString: function quotedString(str) {
	    return this.source.quotedString(str);
	  },

	  objectLiteral: function objectLiteral(obj) {
	    return this.source.objectLiteral(obj);
	  },

	  aliasable: function aliasable(name) {
	    var ret = this.aliases[name];
	    if (ret) {
	      ret.referenceCount++;
	      return ret;
	    }

	    ret = this.aliases[name] = this.source.wrap(name);
	    ret.aliasable = true;
	    ret.referenceCount = 1;

	    return ret;
	  },

	  setupHelper: function setupHelper(paramSize, name, blockHelper) {
	    var params = [],
	        paramsInit = this.setupHelperArgs(name, paramSize, params, blockHelper);
	    var foundHelper = this.nameLookup('helpers', name, 'helper');

	    return {
	      params: params,
	      paramsInit: paramsInit,
	      name: foundHelper,
	      callParams: [this.contextName(0)].concat(params)
	    };
	  },

	  setupParams: function setupParams(helper, paramSize, params) {
	    var options = {},
	        contexts = [],
	        types = [],
	        ids = [],
	        param = undefined;

	    options.name = this.quotedString(helper);
	    options.hash = this.popStack();

	    if (this.trackIds) {
	      options.hashIds = this.popStack();
	    }
	    if (this.stringParams) {
	      options.hashTypes = this.popStack();
	      options.hashContexts = this.popStack();
	    }

	    var inverse = this.popStack(),
	        program = this.popStack();

	    // Avoid setting fn and inverse if neither are set. This allows
	    // helpers to do a check for `if (options.fn)`
	    if (program || inverse) {
	      options.fn = program || 'this.noop';
	      options.inverse = inverse || 'this.noop';
	    }

	    // The parameters go on to the stack in order (making sure that they are evaluated in order)
	    // so we need to pop them off the stack in reverse order
	    var i = paramSize;
	    while (i--) {
	      param = this.popStack();
	      params[i] = param;

	      if (this.trackIds) {
	        ids[i] = this.popStack();
	      }
	      if (this.stringParams) {
	        types[i] = this.popStack();
	        contexts[i] = this.popStack();
	      }
	    }

	    if (this.trackIds) {
	      options.ids = this.source.generateArray(ids);
	    }
	    if (this.stringParams) {
	      options.types = this.source.generateArray(types);
	      options.contexts = this.source.generateArray(contexts);
	    }

	    if (this.options.data) {
	      options.data = 'data';
	    }
	    if (this.useBlockParams) {
	      options.blockParams = 'blockParams';
	    }
	    return options;
	  },

	  setupHelperArgs: function setupHelperArgs(helper, paramSize, params, useRegister) {
	    var options = this.setupParams(helper, paramSize, params, true);
	    options = this.objectLiteral(options);
	    if (useRegister) {
	      this.useRegister('options');
	      params.push('options');
	      return ['options=', options];
	    } else {
	      params.push(options);
	      return '';
	    }
	  }
	};

	(function () {
	  var reservedWords = ('break else new var' + ' case finally return void' + ' catch for switch while' + ' continue function this with' + ' default if throw' + ' delete in try' + ' do instanceof typeof' + ' abstract enum int short' + ' boolean export interface static' + ' byte extends long super' + ' char final native synchronized' + ' class float package throws' + ' const goto private transient' + ' debugger implements protected volatile' + ' double import public let yield await' + ' null true false').split(' ');

	  var compilerWords = JavaScriptCompiler.RESERVED_WORDS = {};

	  for (var i = 0, l = reservedWords.length; i < l; i++) {
	    compilerWords[reservedWords[i]] = true;
	  }
	})();

	JavaScriptCompiler.isValidJavaScriptVariableName = function (name) {
	  return !JavaScriptCompiler.RESERVED_WORDS[name] && /^[a-zA-Z_$][0-9a-zA-Z_$]*$/.test(name);
	};

	function strictLookup(requireTerminal, compiler, parts, type) {
	  var stack = compiler.popStack(),
	      i = 0,
	      len = parts.length;
	  if (requireTerminal) {
	    len--;
	  }

	  for (; i < len; i++) {
	    stack = compiler.nameLookup(stack, parts[i], type);
	  }

	  if (requireTerminal) {
	    return [compiler.aliasable('this.strict'), '(', stack, ', ', compiler.quotedString(parts[i]), ')'];
	  } else {
	    return stack;
	  }
	}

	exports['default'] = JavaScriptCompiler;
	module.exports = exports['default'];

/***/ },
/* 6 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var _AST = __webpack_require__(2);

	var _AST2 = _interopRequireWildcard(_AST);

	function Visitor() {
	  this.parents = [];
	}

	Visitor.prototype = {
	  constructor: Visitor,
	  mutating: false,

	  // Visits a given value. If mutating, will replace the value if necessary.
	  acceptKey: function acceptKey(node, name) {
	    var value = this.accept(node[name]);
	    if (this.mutating) {
	      // Hacky sanity check:
	      if (value && (!value.type || !_AST2['default'][value.type])) {
	        throw new _Exception2['default']('Unexpected node type "' + value.type + '" found when accepting ' + name + ' on ' + node.type);
	      }
	      node[name] = value;
	    }
	  },

	  // Performs an accept operation with added sanity check to ensure
	  // required keys are not removed.
	  acceptRequired: function acceptRequired(node, name) {
	    this.acceptKey(node, name);

	    if (!node[name]) {
	      throw new _Exception2['default'](node.type + ' requires ' + name);
	    }
	  },

	  // Traverses a given array. If mutating, empty respnses will be removed
	  // for child elements.
	  acceptArray: function acceptArray(array) {
	    for (var i = 0, l = array.length; i < l; i++) {
	      this.acceptKey(array, i);

	      if (!array[i]) {
	        array.splice(i, 1);
	        i--;
	        l--;
	      }
	    }
	  },

	  accept: function accept(object) {
	    if (!object) {
	      return;
	    }

	    if (this.current) {
	      this.parents.unshift(this.current);
	    }
	    this.current = object;

	    var ret = this[object.type](object);

	    this.current = this.parents.shift();

	    if (!this.mutating || ret) {
	      return ret;
	    } else if (ret !== false) {
	      return object;
	    }
	  },

	  Program: function Program(program) {
	    this.acceptArray(program.body);
	  },

	  MustacheStatement: function MustacheStatement(mustache) {
	    this.acceptRequired(mustache, 'path');
	    this.acceptArray(mustache.params);
	    this.acceptKey(mustache, 'hash');
	  },

	  BlockStatement: function BlockStatement(block) {
	    this.acceptRequired(block, 'path');
	    this.acceptArray(block.params);
	    this.acceptKey(block, 'hash');

	    this.acceptKey(block, 'program');
	    this.acceptKey(block, 'inverse');
	  },

	  PartialStatement: function PartialStatement(partial) {
	    this.acceptRequired(partial, 'name');
	    this.acceptArray(partial.params);
	    this.acceptKey(partial, 'hash');
	  },

	  ContentStatement: function ContentStatement() {},
	  CommentStatement: function CommentStatement() {},

	  SubExpression: function SubExpression(sexpr) {
	    this.acceptRequired(sexpr, 'path');
	    this.acceptArray(sexpr.params);
	    this.acceptKey(sexpr, 'hash');
	  },

	  PathExpression: function PathExpression() {},

	  StringLiteral: function StringLiteral() {},
	  NumberLiteral: function NumberLiteral() {},
	  BooleanLiteral: function BooleanLiteral() {},
	  UndefinedLiteral: function UndefinedLiteral() {},
	  NullLiteral: function NullLiteral() {},

	  Hash: function Hash(hash) {
	    this.acceptArray(hash.pairs);
	  },
	  HashPair: function HashPair(pair) {
	    this.acceptRequired(pair, 'value');
	  }
	};

	exports['default'] = Visitor;
	module.exports = exports['default'];
	/* content */ /* comment */ /* path */ /* string */ /* number */ /* bool */ /* literal */ /* literal */

/***/ },
/* 7 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {'use strict';

	exports.__esModule = true;
	/*global window */

	exports['default'] = function (Handlebars) {
	  /* istanbul ignore next */
	  var root = typeof global !== 'undefined' ? global : window,
	      $Handlebars = root.Handlebars;
	  /* istanbul ignore next */
	  Handlebars.noConflict = function () {
	    if (root.Handlebars === Handlebars) {
	      root.Handlebars = $Handlebars;
	    }
	  };
	};

	module.exports = exports['default'];
	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 8 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports["default"] = function (obj) {
	  return obj && obj.__esModule ? obj : {
	    "default": obj
	  };
	};

	exports.__esModule = true;

/***/ },
/* 9 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;
	exports.HandlebarsEnvironment = HandlebarsEnvironment;
	exports.createFrame = createFrame;

	var _import = __webpack_require__(12);

	var Utils = _interopRequireWildcard(_import);

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var VERSION = '3.0.1';
	exports.VERSION = VERSION;
	var COMPILER_REVISION = 6;

	exports.COMPILER_REVISION = COMPILER_REVISION;
	var REVISION_CHANGES = {
	  1: '<= 1.0.rc.2', // 1.0.rc.2 is actually rev2 but doesn't report it
	  2: '== 1.0.0-rc.3',
	  3: '== 1.0.0-rc.4',
	  4: '== 1.x.x',
	  5: '== 2.0.0-alpha.x',
	  6: '>= 2.0.0-beta.1'
	};

	exports.REVISION_CHANGES = REVISION_CHANGES;
	var isArray = Utils.isArray,
	    isFunction = Utils.isFunction,
	    toString = Utils.toString,
	    objectType = '[object Object]';

	function HandlebarsEnvironment(helpers, partials) {
	  this.helpers = helpers || {};
	  this.partials = partials || {};

	  registerDefaultHelpers(this);
	}

	HandlebarsEnvironment.prototype = {
	  constructor: HandlebarsEnvironment,

	  logger: logger,
	  log: log,

	  registerHelper: function registerHelper(name, fn) {
	    if (toString.call(name) === objectType) {
	      if (fn) {
	        throw new _Exception2['default']('Arg not supported with multiple helpers');
	      }
	      Utils.extend(this.helpers, name);
	    } else {
	      this.helpers[name] = fn;
	    }
	  },
	  unregisterHelper: function unregisterHelper(name) {
	    delete this.helpers[name];
	  },

	  registerPartial: function registerPartial(name, partial) {
	    if (toString.call(name) === objectType) {
	      Utils.extend(this.partials, name);
	    } else {
	      if (typeof partial === 'undefined') {
	        throw new _Exception2['default']('Attempting to register a partial as undefined');
	      }
	      this.partials[name] = partial;
	    }
	  },
	  unregisterPartial: function unregisterPartial(name) {
	    delete this.partials[name];
	  }
	};

	function registerDefaultHelpers(instance) {
	  instance.registerHelper('helperMissing', function () {
	    if (arguments.length === 1) {
	      // A missing field in a {{foo}} constuct.
	      return undefined;
	    } else {
	      // Someone is actually trying to call something, blow up.
	      throw new _Exception2['default']('Missing helper: "' + arguments[arguments.length - 1].name + '"');
	    }
	  });

	  instance.registerHelper('blockHelperMissing', function (context, options) {
	    var inverse = options.inverse,
	        fn = options.fn;

	    if (context === true) {
	      return fn(this);
	    } else if (context === false || context == null) {
	      return inverse(this);
	    } else if (isArray(context)) {
	      if (context.length > 0) {
	        if (options.ids) {
	          options.ids = [options.name];
	        }

	        return instance.helpers.each(context, options);
	      } else {
	        return inverse(this);
	      }
	    } else {
	      if (options.data && options.ids) {
	        var data = createFrame(options.data);
	        data.contextPath = Utils.appendContextPath(options.data.contextPath, options.name);
	        options = { data: data };
	      }

	      return fn(context, options);
	    }
	  });

	  instance.registerHelper('each', function (context, options) {
	    if (!options) {
	      throw new _Exception2['default']('Must pass iterator to #each');
	    }

	    var fn = options.fn,
	        inverse = options.inverse,
	        i = 0,
	        ret = '',
	        data = undefined,
	        contextPath = undefined;

	    if (options.data && options.ids) {
	      contextPath = Utils.appendContextPath(options.data.contextPath, options.ids[0]) + '.';
	    }

	    if (isFunction(context)) {
	      context = context.call(this);
	    }

	    if (options.data) {
	      data = createFrame(options.data);
	    }

	    function execIteration(field, index, last) {
	      if (data) {
	        data.key = field;
	        data.index = index;
	        data.first = index === 0;
	        data.last = !!last;

	        if (contextPath) {
	          data.contextPath = contextPath + field;
	        }
	      }

	      ret = ret + fn(context[field], {
	        data: data,
	        blockParams: Utils.blockParams([context[field], field], [contextPath + field, null])
	      });
	    }

	    if (context && typeof context === 'object') {
	      if (isArray(context)) {
	        for (var j = context.length; i < j; i++) {
	          execIteration(i, i, i === context.length - 1);
	        }
	      } else {
	        var priorKey = undefined;

	        for (var key in context) {
	          if (context.hasOwnProperty(key)) {
	            // We're running the iterations one step out of sync so we can detect
	            // the last iteration without have to scan the object twice and create
	            // an itermediate keys array.
	            if (priorKey) {
	              execIteration(priorKey, i - 1);
	            }
	            priorKey = key;
	            i++;
	          }
	        }
	        if (priorKey) {
	          execIteration(priorKey, i - 1, true);
	        }
	      }
	    }

	    if (i === 0) {
	      ret = inverse(this);
	    }

	    return ret;
	  });

	  instance.registerHelper('if', function (conditional, options) {
	    if (isFunction(conditional)) {
	      conditional = conditional.call(this);
	    }

	    // Default behavior is to render the positive path if the value is truthy and not empty.
	    // The `includeZero` option may be set to treat the condtional as purely not empty based on the
	    // behavior of isEmpty. Effectively this determines if 0 is handled by the positive path or negative.
	    if (!options.hash.includeZero && !conditional || Utils.isEmpty(conditional)) {
	      return options.inverse(this);
	    } else {
	      return options.fn(this);
	    }
	  });

	  instance.registerHelper('unless', function (conditional, options) {
	    return instance.helpers['if'].call(this, conditional, { fn: options.inverse, inverse: options.fn, hash: options.hash });
	  });

	  instance.registerHelper('with', function (context, options) {
	    if (isFunction(context)) {
	      context = context.call(this);
	    }

	    var fn = options.fn;

	    if (!Utils.isEmpty(context)) {
	      if (options.data && options.ids) {
	        var data = createFrame(options.data);
	        data.contextPath = Utils.appendContextPath(options.data.contextPath, options.ids[0]);
	        options = { data: data };
	      }

	      return fn(context, options);
	    } else {
	      return options.inverse(this);
	    }
	  });

	  instance.registerHelper('log', function (message, options) {
	    var level = options.data && options.data.level != null ? parseInt(options.data.level, 10) : 1;
	    instance.log(level, message);
	  });

	  instance.registerHelper('lookup', function (obj, field) {
	    return obj && obj[field];
	  });
	}

	var logger = {
	  methodMap: { 0: 'debug', 1: 'info', 2: 'warn', 3: 'error' },

	  // State enum
	  DEBUG: 0,
	  INFO: 1,
	  WARN: 2,
	  ERROR: 3,
	  level: 1,

	  // Can be overridden in the host environment
	  log: function log(level, message) {
	    if (typeof console !== 'undefined' && logger.level <= level) {
	      var method = logger.methodMap[level];
	      (console[method] || console.log).call(console, message); // eslint-disable-line no-console
	    }
	  }
	};

	exports.logger = logger;
	var log = logger.log;

	exports.log = log;

	function createFrame(object) {
	  var frame = Utils.extend({}, object);
	  frame._parent = object;
	  return frame;
	}

	/* [args, ]options */

/***/ },
/* 10 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	exports.__esModule = true;
	// Build out our basic SafeString type
	function SafeString(string) {
	  this.string = string;
	}

	SafeString.prototype.toString = SafeString.prototype.toHTML = function () {
	  return '' + this.string;
	};

	exports['default'] = SafeString;
	module.exports = exports['default'];

/***/ },
/* 11 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	exports.__esModule = true;

	var errorProps = ['description', 'fileName', 'lineNumber', 'message', 'name', 'number', 'stack'];

	function Exception(message, node) {
	  var loc = node && node.loc,
	      line = undefined,
	      column = undefined;
	  if (loc) {
	    line = loc.start.line;
	    column = loc.start.column;

	    message += ' - ' + line + ':' + column;
	  }

	  var tmp = Error.prototype.constructor.call(this, message);

	  // Unfortunately errors are not enumerable in Chrome (at least), so `for prop in tmp` doesn't work.
	  for (var idx = 0; idx < errorProps.length; idx++) {
	    this[errorProps[idx]] = tmp[errorProps[idx]];
	  }

	  if (Error.captureStackTrace) {
	    Error.captureStackTrace(this, Exception);
	  }

	  if (loc) {
	    this.lineNumber = line;
	    this.column = column;
	  }
	}

	Exception.prototype = new Error();

	exports['default'] = Exception;
	module.exports = exports['default'];

/***/ },
/* 12 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	exports.__esModule = true;
	exports.extend = extend;

	// Older IE versions do not directly support indexOf so we must implement our own, sadly.
	exports.indexOf = indexOf;
	exports.escapeExpression = escapeExpression;
	exports.isEmpty = isEmpty;
	exports.blockParams = blockParams;
	exports.appendContextPath = appendContextPath;
	var escape = {
	  '&': '&amp;',
	  '<': '&lt;',
	  '>': '&gt;',
	  '"': '&quot;',
	  '\'': '&#x27;',
	  '`': '&#x60;'
	};

	var badChars = /[&<>"'`]/g,
	    possible = /[&<>"'`]/;

	function escapeChar(chr) {
	  return escape[chr];
	}

	function extend(obj /* , ...source */) {
	  for (var i = 1; i < arguments.length; i++) {
	    for (var key in arguments[i]) {
	      if (Object.prototype.hasOwnProperty.call(arguments[i], key)) {
	        obj[key] = arguments[i][key];
	      }
	    }
	  }

	  return obj;
	}

	var toString = Object.prototype.toString;

	exports.toString = toString;
	// Sourced from lodash
	// https://github.com/bestiejs/lodash/blob/master/LICENSE.txt
	/*eslint-disable func-style, no-var */
	var isFunction = function isFunction(value) {
	  return typeof value === 'function';
	};
	// fallback for older versions of Chrome and Safari
	/* istanbul ignore next */
	if (isFunction(/x/)) {
	  exports.isFunction = isFunction = function (value) {
	    return typeof value === 'function' && toString.call(value) === '[object Function]';
	  };
	}
	var isFunction;
	exports.isFunction = isFunction;
	/*eslint-enable func-style, no-var */

	/* istanbul ignore next */
	var isArray = Array.isArray || function (value) {
	  return value && typeof value === 'object' ? toString.call(value) === '[object Array]' : false;
	};exports.isArray = isArray;

	function indexOf(array, value) {
	  for (var i = 0, len = array.length; i < len; i++) {
	    if (array[i] === value) {
	      return i;
	    }
	  }
	  return -1;
	}

	function escapeExpression(string) {
	  if (typeof string !== 'string') {
	    // don't escape SafeStrings, since they're already safe
	    if (string && string.toHTML) {
	      return string.toHTML();
	    } else if (string == null) {
	      return '';
	    } else if (!string) {
	      return string + '';
	    }

	    // Force a string conversion as this will be done by the append regardless and
	    // the regex test will do this transparently behind the scenes, causing issues if
	    // an object's to string has escaped characters in it.
	    string = '' + string;
	  }

	  if (!possible.test(string)) {
	    return string;
	  }
	  return string.replace(badChars, escapeChar);
	}

	function isEmpty(value) {
	  if (!value && value !== 0) {
	    return true;
	  } else if (isArray(value) && value.length === 0) {
	    return true;
	  } else {
	    return false;
	  }
	}

	function blockParams(params, ids) {
	  params.path = ids;
	  return params;
	}

	function appendContextPath(contextPath, id) {
	  return (contextPath ? contextPath + '.' : '') + id;
	}

/***/ },
/* 13 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;
	exports.checkRevision = checkRevision;

	// TODO: Remove this line and break up compilePartial

	exports.template = template;
	exports.wrapProgram = wrapProgram;
	exports.resolvePartial = resolvePartial;
	exports.invokePartial = invokePartial;
	exports.noop = noop;

	var _import = __webpack_require__(12);

	var Utils = _interopRequireWildcard(_import);

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	var _COMPILER_REVISION$REVISION_CHANGES$createFrame = __webpack_require__(9);

	function checkRevision(compilerInfo) {
	  var compilerRevision = compilerInfo && compilerInfo[0] || 1,
	      currentRevision = _COMPILER_REVISION$REVISION_CHANGES$createFrame.COMPILER_REVISION;

	  if (compilerRevision !== currentRevision) {
	    if (compilerRevision < currentRevision) {
	      var runtimeVersions = _COMPILER_REVISION$REVISION_CHANGES$createFrame.REVISION_CHANGES[currentRevision],
	          compilerVersions = _COMPILER_REVISION$REVISION_CHANGES$createFrame.REVISION_CHANGES[compilerRevision];
	      throw new _Exception2['default']('Template was precompiled with an older version of Handlebars than the current runtime. ' + 'Please update your precompiler to a newer version (' + runtimeVersions + ') or downgrade your runtime to an older version (' + compilerVersions + ').');
	    } else {
	      // Use the embedded version info since the runtime doesn't know about this revision yet
	      throw new _Exception2['default']('Template was precompiled with a newer version of Handlebars than the current runtime. ' + 'Please update your runtime to a newer version (' + compilerInfo[1] + ').');
	    }
	  }
	}

	function template(templateSpec, env) {
	  /* istanbul ignore next */
	  if (!env) {
	    throw new _Exception2['default']('No environment passed to template');
	  }
	  if (!templateSpec || !templateSpec.main) {
	    throw new _Exception2['default']('Unknown template object: ' + typeof templateSpec);
	  }

	  // Note: Using env.VM references rather than local var references throughout this section to allow
	  // for external users to override these as psuedo-supported APIs.
	  env.VM.checkRevision(templateSpec.compiler);

	  function invokePartialWrapper(partial, context, options) {
	    if (options.hash) {
	      context = Utils.extend({}, context, options.hash);
	    }

	    partial = env.VM.resolvePartial.call(this, partial, context, options);
	    var result = env.VM.invokePartial.call(this, partial, context, options);

	    if (result == null && env.compile) {
	      options.partials[options.name] = env.compile(partial, templateSpec.compilerOptions, env);
	      result = options.partials[options.name](context, options);
	    }
	    if (result != null) {
	      if (options.indent) {
	        var lines = result.split('\n');
	        for (var i = 0, l = lines.length; i < l; i++) {
	          if (!lines[i] && i + 1 === l) {
	            break;
	          }

	          lines[i] = options.indent + lines[i];
	        }
	        result = lines.join('\n');
	      }
	      return result;
	    } else {
	      throw new _Exception2['default']('The partial ' + options.name + ' could not be compiled when running in runtime-only mode');
	    }
	  }

	  // Just add water
	  var container = {
	    strict: function strict(obj, name) {
	      if (!(name in obj)) {
	        throw new _Exception2['default']('"' + name + '" not defined in ' + obj);
	      }
	      return obj[name];
	    },
	    lookup: function lookup(depths, name) {
	      var len = depths.length;
	      for (var i = 0; i < len; i++) {
	        if (depths[i] && depths[i][name] != null) {
	          return depths[i][name];
	        }
	      }
	    },
	    lambda: function lambda(current, context) {
	      return typeof current === 'function' ? current.call(context) : current;
	    },

	    escapeExpression: Utils.escapeExpression,
	    invokePartial: invokePartialWrapper,

	    fn: function fn(i) {
	      return templateSpec[i];
	    },

	    programs: [],
	    program: function program(i, data, declaredBlockParams, blockParams, depths) {
	      var programWrapper = this.programs[i],
	          fn = this.fn(i);
	      if (data || depths || blockParams || declaredBlockParams) {
	        programWrapper = wrapProgram(this, i, fn, data, declaredBlockParams, blockParams, depths);
	      } else if (!programWrapper) {
	        programWrapper = this.programs[i] = wrapProgram(this, i, fn);
	      }
	      return programWrapper;
	    },

	    data: function data(value, depth) {
	      while (value && depth--) {
	        value = value._parent;
	      }
	      return value;
	    },
	    merge: function merge(param, common) {
	      var obj = param || common;

	      if (param && common && param !== common) {
	        obj = Utils.extend({}, common, param);
	      }

	      return obj;
	    },

	    noop: env.VM.noop,
	    compilerInfo: templateSpec.compiler
	  };

	  function ret(context) {
	    var options = arguments[1] === undefined ? {} : arguments[1];

	    var data = options.data;

	    ret._setup(options);
	    if (!options.partial && templateSpec.useData) {
	      data = initData(context, data);
	    }
	    var depths = undefined,
	        blockParams = templateSpec.useBlockParams ? [] : undefined;
	    if (templateSpec.useDepths) {
	      depths = options.depths ? [context].concat(options.depths) : [context];
	    }

	    return templateSpec.main.call(container, context, container.helpers, container.partials, data, blockParams, depths);
	  }
	  ret.isTop = true;

	  ret._setup = function (options) {
	    if (!options.partial) {
	      container.helpers = container.merge(options.helpers, env.helpers);

	      if (templateSpec.usePartial) {
	        container.partials = container.merge(options.partials, env.partials);
	      }
	    } else {
	      container.helpers = options.helpers;
	      container.partials = options.partials;
	    }
	  };

	  ret._child = function (i, data, blockParams, depths) {
	    if (templateSpec.useBlockParams && !blockParams) {
	      throw new _Exception2['default']('must pass block params');
	    }
	    if (templateSpec.useDepths && !depths) {
	      throw new _Exception2['default']('must pass parent depths');
	    }

	    return wrapProgram(container, i, templateSpec[i], data, 0, blockParams, depths);
	  };
	  return ret;
	}

	function wrapProgram(container, i, fn, data, declaredBlockParams, blockParams, depths) {
	  function prog(context) {
	    var options = arguments[1] === undefined ? {} : arguments[1];

	    return fn.call(container, context, container.helpers, container.partials, options.data || data, blockParams && [options.blockParams].concat(blockParams), depths && [context].concat(depths));
	  }
	  prog.program = i;
	  prog.depth = depths ? depths.length : 0;
	  prog.blockParams = declaredBlockParams || 0;
	  return prog;
	}

	function resolvePartial(partial, context, options) {
	  if (!partial) {
	    partial = options.partials[options.name];
	  } else if (!partial.call && !options.name) {
	    // This is a dynamic partial that returned a string
	    options.name = partial;
	    partial = options.partials[partial];
	  }
	  return partial;
	}

	function invokePartial(partial, context, options) {
	  options.partial = true;

	  if (partial === undefined) {
	    throw new _Exception2['default']('The partial ' + options.name + ' could not be found');
	  } else if (partial instanceof Function) {
	    return partial(context, options);
	  }
	}

	function noop() {
	  return '';
	}

	function initData(context, data) {
	  if (!data || !('root' in data)) {
	    data = data ? _COMPILER_REVISION$REVISION_CHANGES$createFrame.createFrame(data) : {};
	    data.root = context;
	  }
	  return data;
	}

/***/ },
/* 14 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports.__esModule = true;
	/* istanbul ignore next */
	/* Jison generated parser */
	var handlebars = (function () {
	    var parser = { trace: function trace() {},
	        yy: {},
	        symbols_: { error: 2, root: 3, program: 4, EOF: 5, program_repetition0: 6, statement: 7, mustache: 8, block: 9, rawBlock: 10, partial: 11, content: 12, COMMENT: 13, CONTENT: 14, openRawBlock: 15, END_RAW_BLOCK: 16, OPEN_RAW_BLOCK: 17, helperName: 18, openRawBlock_repetition0: 19, openRawBlock_option0: 20, CLOSE_RAW_BLOCK: 21, openBlock: 22, block_option0: 23, closeBlock: 24, openInverse: 25, block_option1: 26, OPEN_BLOCK: 27, openBlock_repetition0: 28, openBlock_option0: 29, openBlock_option1: 30, CLOSE: 31, OPEN_INVERSE: 32, openInverse_repetition0: 33, openInverse_option0: 34, openInverse_option1: 35, openInverseChain: 36, OPEN_INVERSE_CHAIN: 37, openInverseChain_repetition0: 38, openInverseChain_option0: 39, openInverseChain_option1: 40, inverseAndProgram: 41, INVERSE: 42, inverseChain: 43, inverseChain_option0: 44, OPEN_ENDBLOCK: 45, OPEN: 46, mustache_repetition0: 47, mustache_option0: 48, OPEN_UNESCAPED: 49, mustache_repetition1: 50, mustache_option1: 51, CLOSE_UNESCAPED: 52, OPEN_PARTIAL: 53, partialName: 54, partial_repetition0: 55, partial_option0: 56, param: 57, sexpr: 58, OPEN_SEXPR: 59, sexpr_repetition0: 60, sexpr_option0: 61, CLOSE_SEXPR: 62, hash: 63, hash_repetition_plus0: 64, hashSegment: 65, ID: 66, EQUALS: 67, blockParams: 68, OPEN_BLOCK_PARAMS: 69, blockParams_repetition_plus0: 70, CLOSE_BLOCK_PARAMS: 71, path: 72, dataName: 73, STRING: 74, NUMBER: 75, BOOLEAN: 76, UNDEFINED: 77, NULL: 78, DATA: 79, pathSegments: 80, SEP: 81, $accept: 0, $end: 1 },
	        terminals_: { 2: "error", 5: "EOF", 13: "COMMENT", 14: "CONTENT", 16: "END_RAW_BLOCK", 17: "OPEN_RAW_BLOCK", 21: "CLOSE_RAW_BLOCK", 27: "OPEN_BLOCK", 31: "CLOSE", 32: "OPEN_INVERSE", 37: "OPEN_INVERSE_CHAIN", 42: "INVERSE", 45: "OPEN_ENDBLOCK", 46: "OPEN", 49: "OPEN_UNESCAPED", 52: "CLOSE_UNESCAPED", 53: "OPEN_PARTIAL", 59: "OPEN_SEXPR", 62: "CLOSE_SEXPR", 66: "ID", 67: "EQUALS", 69: "OPEN_BLOCK_PARAMS", 71: "CLOSE_BLOCK_PARAMS", 74: "STRING", 75: "NUMBER", 76: "BOOLEAN", 77: "UNDEFINED", 78: "NULL", 79: "DATA", 81: "SEP" },
	        productions_: [0, [3, 2], [4, 1], [7, 1], [7, 1], [7, 1], [7, 1], [7, 1], [7, 1], [12, 1], [10, 3], [15, 5], [9, 4], [9, 4], [22, 6], [25, 6], [36, 6], [41, 2], [43, 3], [43, 1], [24, 3], [8, 5], [8, 5], [11, 5], [57, 1], [57, 1], [58, 5], [63, 1], [65, 3], [68, 3], [18, 1], [18, 1], [18, 1], [18, 1], [18, 1], [18, 1], [18, 1], [54, 1], [54, 1], [73, 2], [72, 1], [80, 3], [80, 1], [6, 0], [6, 2], [19, 0], [19, 2], [20, 0], [20, 1], [23, 0], [23, 1], [26, 0], [26, 1], [28, 0], [28, 2], [29, 0], [29, 1], [30, 0], [30, 1], [33, 0], [33, 2], [34, 0], [34, 1], [35, 0], [35, 1], [38, 0], [38, 2], [39, 0], [39, 1], [40, 0], [40, 1], [44, 0], [44, 1], [47, 0], [47, 2], [48, 0], [48, 1], [50, 0], [50, 2], [51, 0], [51, 1], [55, 0], [55, 2], [56, 0], [56, 1], [60, 0], [60, 2], [61, 0], [61, 1], [64, 1], [64, 2], [70, 1], [70, 2]],
	        performAction: function anonymous(yytext, yyleng, yylineno, yy, yystate, $$, _$) {

	            var $0 = $$.length - 1;
	            switch (yystate) {
	                case 1:
	                    return $$[$0 - 1];
	                    break;
	                case 2:
	                    this.$ = new yy.Program($$[$0], null, {}, yy.locInfo(this._$));
	                    break;
	                case 3:
	                    this.$ = $$[$0];
	                    break;
	                case 4:
	                    this.$ = $$[$0];
	                    break;
	                case 5:
	                    this.$ = $$[$0];
	                    break;
	                case 6:
	                    this.$ = $$[$0];
	                    break;
	                case 7:
	                    this.$ = $$[$0];
	                    break;
	                case 8:
	                    this.$ = new yy.CommentStatement(yy.stripComment($$[$0]), yy.stripFlags($$[$0], $$[$0]), yy.locInfo(this._$));
	                    break;
	                case 9:
	                    this.$ = new yy.ContentStatement($$[$0], yy.locInfo(this._$));
	                    break;
	                case 10:
	                    this.$ = yy.prepareRawBlock($$[$0 - 2], $$[$0 - 1], $$[$0], this._$);
	                    break;
	                case 11:
	                    this.$ = { path: $$[$0 - 3], params: $$[$0 - 2], hash: $$[$0 - 1] };
	                    break;
	                case 12:
	                    this.$ = yy.prepareBlock($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], $$[$0], false, this._$);
	                    break;
	                case 13:
	                    this.$ = yy.prepareBlock($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], $$[$0], true, this._$);
	                    break;
	                case 14:
	                    this.$ = { path: $$[$0 - 4], params: $$[$0 - 3], hash: $$[$0 - 2], blockParams: $$[$0 - 1], strip: yy.stripFlags($$[$0 - 5], $$[$0]) };
	                    break;
	                case 15:
	                    this.$ = { path: $$[$0 - 4], params: $$[$0 - 3], hash: $$[$0 - 2], blockParams: $$[$0 - 1], strip: yy.stripFlags($$[$0 - 5], $$[$0]) };
	                    break;
	                case 16:
	                    this.$ = { path: $$[$0 - 4], params: $$[$0 - 3], hash: $$[$0 - 2], blockParams: $$[$0 - 1], strip: yy.stripFlags($$[$0 - 5], $$[$0]) };
	                    break;
	                case 17:
	                    this.$ = { strip: yy.stripFlags($$[$0 - 1], $$[$0 - 1]), program: $$[$0] };
	                    break;
	                case 18:
	                    var inverse = yy.prepareBlock($$[$0 - 2], $$[$0 - 1], $$[$0], $$[$0], false, this._$),
	                        program = new yy.Program([inverse], null, {}, yy.locInfo(this._$));
	                    program.chained = true;

	                    this.$ = { strip: $$[$0 - 2].strip, program: program, chain: true };

	                    break;
	                case 19:
	                    this.$ = $$[$0];
	                    break;
	                case 20:
	                    this.$ = { path: $$[$0 - 1], strip: yy.stripFlags($$[$0 - 2], $$[$0]) };
	                    break;
	                case 21:
	                    this.$ = yy.prepareMustache($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], $$[$0 - 4], yy.stripFlags($$[$0 - 4], $$[$0]), this._$);
	                    break;
	                case 22:
	                    this.$ = yy.prepareMustache($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], $$[$0 - 4], yy.stripFlags($$[$0 - 4], $$[$0]), this._$);
	                    break;
	                case 23:
	                    this.$ = new yy.PartialStatement($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], yy.stripFlags($$[$0 - 4], $$[$0]), yy.locInfo(this._$));
	                    break;
	                case 24:
	                    this.$ = $$[$0];
	                    break;
	                case 25:
	                    this.$ = $$[$0];
	                    break;
	                case 26:
	                    this.$ = new yy.SubExpression($$[$0 - 3], $$[$0 - 2], $$[$0 - 1], yy.locInfo(this._$));
	                    break;
	                case 27:
	                    this.$ = new yy.Hash($$[$0], yy.locInfo(this._$));
	                    break;
	                case 28:
	                    this.$ = new yy.HashPair(yy.id($$[$0 - 2]), $$[$0], yy.locInfo(this._$));
	                    break;
	                case 29:
	                    this.$ = yy.id($$[$0 - 1]);
	                    break;
	                case 30:
	                    this.$ = $$[$0];
	                    break;
	                case 31:
	                    this.$ = $$[$0];
	                    break;
	                case 32:
	                    this.$ = new yy.StringLiteral($$[$0], yy.locInfo(this._$));
	                    break;
	                case 33:
	                    this.$ = new yy.NumberLiteral($$[$0], yy.locInfo(this._$));
	                    break;
	                case 34:
	                    this.$ = new yy.BooleanLiteral($$[$0], yy.locInfo(this._$));
	                    break;
	                case 35:
	                    this.$ = new yy.UndefinedLiteral(yy.locInfo(this._$));
	                    break;
	                case 36:
	                    this.$ = new yy.NullLiteral(yy.locInfo(this._$));
	                    break;
	                case 37:
	                    this.$ = $$[$0];
	                    break;
	                case 38:
	                    this.$ = $$[$0];
	                    break;
	                case 39:
	                    this.$ = yy.preparePath(true, $$[$0], this._$);
	                    break;
	                case 40:
	                    this.$ = yy.preparePath(false, $$[$0], this._$);
	                    break;
	                case 41:
	                    $$[$0 - 2].push({ part: yy.id($$[$0]), original: $$[$0], separator: $$[$0 - 1] });this.$ = $$[$0 - 2];
	                    break;
	                case 42:
	                    this.$ = [{ part: yy.id($$[$0]), original: $$[$0] }];
	                    break;
	                case 43:
	                    this.$ = [];
	                    break;
	                case 44:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 45:
	                    this.$ = [];
	                    break;
	                case 46:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 53:
	                    this.$ = [];
	                    break;
	                case 54:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 59:
	                    this.$ = [];
	                    break;
	                case 60:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 65:
	                    this.$ = [];
	                    break;
	                case 66:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 73:
	                    this.$ = [];
	                    break;
	                case 74:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 77:
	                    this.$ = [];
	                    break;
	                case 78:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 81:
	                    this.$ = [];
	                    break;
	                case 82:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 85:
	                    this.$ = [];
	                    break;
	                case 86:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 89:
	                    this.$ = [$$[$0]];
	                    break;
	                case 90:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	                case 91:
	                    this.$ = [$$[$0]];
	                    break;
	                case 92:
	                    $$[$0 - 1].push($$[$0]);
	                    break;
	            }
	        },
	        table: [{ 3: 1, 4: 2, 5: [2, 43], 6: 3, 13: [2, 43], 14: [2, 43], 17: [2, 43], 27: [2, 43], 32: [2, 43], 46: [2, 43], 49: [2, 43], 53: [2, 43] }, { 1: [3] }, { 5: [1, 4] }, { 5: [2, 2], 7: 5, 8: 6, 9: 7, 10: 8, 11: 9, 12: 10, 13: [1, 11], 14: [1, 18], 15: 16, 17: [1, 21], 22: 14, 25: 15, 27: [1, 19], 32: [1, 20], 37: [2, 2], 42: [2, 2], 45: [2, 2], 46: [1, 12], 49: [1, 13], 53: [1, 17] }, { 1: [2, 1] }, { 5: [2, 44], 13: [2, 44], 14: [2, 44], 17: [2, 44], 27: [2, 44], 32: [2, 44], 37: [2, 44], 42: [2, 44], 45: [2, 44], 46: [2, 44], 49: [2, 44], 53: [2, 44] }, { 5: [2, 3], 13: [2, 3], 14: [2, 3], 17: [2, 3], 27: [2, 3], 32: [2, 3], 37: [2, 3], 42: [2, 3], 45: [2, 3], 46: [2, 3], 49: [2, 3], 53: [2, 3] }, { 5: [2, 4], 13: [2, 4], 14: [2, 4], 17: [2, 4], 27: [2, 4], 32: [2, 4], 37: [2, 4], 42: [2, 4], 45: [2, 4], 46: [2, 4], 49: [2, 4], 53: [2, 4] }, { 5: [2, 5], 13: [2, 5], 14: [2, 5], 17: [2, 5], 27: [2, 5], 32: [2, 5], 37: [2, 5], 42: [2, 5], 45: [2, 5], 46: [2, 5], 49: [2, 5], 53: [2, 5] }, { 5: [2, 6], 13: [2, 6], 14: [2, 6], 17: [2, 6], 27: [2, 6], 32: [2, 6], 37: [2, 6], 42: [2, 6], 45: [2, 6], 46: [2, 6], 49: [2, 6], 53: [2, 6] }, { 5: [2, 7], 13: [2, 7], 14: [2, 7], 17: [2, 7], 27: [2, 7], 32: [2, 7], 37: [2, 7], 42: [2, 7], 45: [2, 7], 46: [2, 7], 49: [2, 7], 53: [2, 7] }, { 5: [2, 8], 13: [2, 8], 14: [2, 8], 17: [2, 8], 27: [2, 8], 32: [2, 8], 37: [2, 8], 42: [2, 8], 45: [2, 8], 46: [2, 8], 49: [2, 8], 53: [2, 8] }, { 18: 22, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 18: 33, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 4: 34, 6: 3, 13: [2, 43], 14: [2, 43], 17: [2, 43], 27: [2, 43], 32: [2, 43], 37: [2, 43], 42: [2, 43], 45: [2, 43], 46: [2, 43], 49: [2, 43], 53: [2, 43] }, { 4: 35, 6: 3, 13: [2, 43], 14: [2, 43], 17: [2, 43], 27: [2, 43], 32: [2, 43], 42: [2, 43], 45: [2, 43], 46: [2, 43], 49: [2, 43], 53: [2, 43] }, { 12: 36, 14: [1, 18] }, { 18: 38, 54: 37, 58: 39, 59: [1, 40], 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 5: [2, 9], 13: [2, 9], 14: [2, 9], 16: [2, 9], 17: [2, 9], 27: [2, 9], 32: [2, 9], 37: [2, 9], 42: [2, 9], 45: [2, 9], 46: [2, 9], 49: [2, 9], 53: [2, 9] }, { 18: 41, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 18: 42, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 18: 43, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 31: [2, 73], 47: 44, 59: [2, 73], 66: [2, 73], 74: [2, 73], 75: [2, 73], 76: [2, 73], 77: [2, 73], 78: [2, 73], 79: [2, 73] }, { 21: [2, 30], 31: [2, 30], 52: [2, 30], 59: [2, 30], 62: [2, 30], 66: [2, 30], 69: [2, 30], 74: [2, 30], 75: [2, 30], 76: [2, 30], 77: [2, 30], 78: [2, 30], 79: [2, 30] }, { 21: [2, 31], 31: [2, 31], 52: [2, 31], 59: [2, 31], 62: [2, 31], 66: [2, 31], 69: [2, 31], 74: [2, 31], 75: [2, 31], 76: [2, 31], 77: [2, 31], 78: [2, 31], 79: [2, 31] }, { 21: [2, 32], 31: [2, 32], 52: [2, 32], 59: [2, 32], 62: [2, 32], 66: [2, 32], 69: [2, 32], 74: [2, 32], 75: [2, 32], 76: [2, 32], 77: [2, 32], 78: [2, 32], 79: [2, 32] }, { 21: [2, 33], 31: [2, 33], 52: [2, 33], 59: [2, 33], 62: [2, 33], 66: [2, 33], 69: [2, 33], 74: [2, 33], 75: [2, 33], 76: [2, 33], 77: [2, 33], 78: [2, 33], 79: [2, 33] }, { 21: [2, 34], 31: [2, 34], 52: [2, 34], 59: [2, 34], 62: [2, 34], 66: [2, 34], 69: [2, 34], 74: [2, 34], 75: [2, 34], 76: [2, 34], 77: [2, 34], 78: [2, 34], 79: [2, 34] }, { 21: [2, 35], 31: [2, 35], 52: [2, 35], 59: [2, 35], 62: [2, 35], 66: [2, 35], 69: [2, 35], 74: [2, 35], 75: [2, 35], 76: [2, 35], 77: [2, 35], 78: [2, 35], 79: [2, 35] }, { 21: [2, 36], 31: [2, 36], 52: [2, 36], 59: [2, 36], 62: [2, 36], 66: [2, 36], 69: [2, 36], 74: [2, 36], 75: [2, 36], 76: [2, 36], 77: [2, 36], 78: [2, 36], 79: [2, 36] }, { 21: [2, 40], 31: [2, 40], 52: [2, 40], 59: [2, 40], 62: [2, 40], 66: [2, 40], 69: [2, 40], 74: [2, 40], 75: [2, 40], 76: [2, 40], 77: [2, 40], 78: [2, 40], 79: [2, 40], 81: [1, 45] }, { 66: [1, 32], 80: 46 }, { 21: [2, 42], 31: [2, 42], 52: [2, 42], 59: [2, 42], 62: [2, 42], 66: [2, 42], 69: [2, 42], 74: [2, 42], 75: [2, 42], 76: [2, 42], 77: [2, 42], 78: [2, 42], 79: [2, 42], 81: [2, 42] }, { 50: 47, 52: [2, 77], 59: [2, 77], 66: [2, 77], 74: [2, 77], 75: [2, 77], 76: [2, 77], 77: [2, 77], 78: [2, 77], 79: [2, 77] }, { 23: 48, 36: 50, 37: [1, 52], 41: 51, 42: [1, 53], 43: 49, 45: [2, 49] }, { 26: 54, 41: 55, 42: [1, 53], 45: [2, 51] }, { 16: [1, 56] }, { 31: [2, 81], 55: 57, 59: [2, 81], 66: [2, 81], 74: [2, 81], 75: [2, 81], 76: [2, 81], 77: [2, 81], 78: [2, 81], 79: [2, 81] }, { 31: [2, 37], 59: [2, 37], 66: [2, 37], 74: [2, 37], 75: [2, 37], 76: [2, 37], 77: [2, 37], 78: [2, 37], 79: [2, 37] }, { 31: [2, 38], 59: [2, 38], 66: [2, 38], 74: [2, 38], 75: [2, 38], 76: [2, 38], 77: [2, 38], 78: [2, 38], 79: [2, 38] }, { 18: 58, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 28: 59, 31: [2, 53], 59: [2, 53], 66: [2, 53], 69: [2, 53], 74: [2, 53], 75: [2, 53], 76: [2, 53], 77: [2, 53], 78: [2, 53], 79: [2, 53] }, { 31: [2, 59], 33: 60, 59: [2, 59], 66: [2, 59], 69: [2, 59], 74: [2, 59], 75: [2, 59], 76: [2, 59], 77: [2, 59], 78: [2, 59], 79: [2, 59] }, { 19: 61, 21: [2, 45], 59: [2, 45], 66: [2, 45], 74: [2, 45], 75: [2, 45], 76: [2, 45], 77: [2, 45], 78: [2, 45], 79: [2, 45] }, { 18: 65, 31: [2, 75], 48: 62, 57: 63, 58: 66, 59: [1, 40], 63: 64, 64: 67, 65: 68, 66: [1, 69], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 66: [1, 70] }, { 21: [2, 39], 31: [2, 39], 52: [2, 39], 59: [2, 39], 62: [2, 39], 66: [2, 39], 69: [2, 39], 74: [2, 39], 75: [2, 39], 76: [2, 39], 77: [2, 39], 78: [2, 39], 79: [2, 39], 81: [1, 45] }, { 18: 65, 51: 71, 52: [2, 79], 57: 72, 58: 66, 59: [1, 40], 63: 73, 64: 67, 65: 68, 66: [1, 69], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 24: 74, 45: [1, 75] }, { 45: [2, 50] }, { 4: 76, 6: 3, 13: [2, 43], 14: [2, 43], 17: [2, 43], 27: [2, 43], 32: [2, 43], 37: [2, 43], 42: [2, 43], 45: [2, 43], 46: [2, 43], 49: [2, 43], 53: [2, 43] }, { 45: [2, 19] }, { 18: 77, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 4: 78, 6: 3, 13: [2, 43], 14: [2, 43], 17: [2, 43], 27: [2, 43], 32: [2, 43], 45: [2, 43], 46: [2, 43], 49: [2, 43], 53: [2, 43] }, { 24: 79, 45: [1, 75] }, { 45: [2, 52] }, { 5: [2, 10], 13: [2, 10], 14: [2, 10], 17: [2, 10], 27: [2, 10], 32: [2, 10], 37: [2, 10], 42: [2, 10], 45: [2, 10], 46: [2, 10], 49: [2, 10], 53: [2, 10] }, { 18: 65, 31: [2, 83], 56: 80, 57: 81, 58: 66, 59: [1, 40], 63: 82, 64: 67, 65: 68, 66: [1, 69], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 59: [2, 85], 60: 83, 62: [2, 85], 66: [2, 85], 74: [2, 85], 75: [2, 85], 76: [2, 85], 77: [2, 85], 78: [2, 85], 79: [2, 85] }, { 18: 65, 29: 84, 31: [2, 55], 57: 85, 58: 66, 59: [1, 40], 63: 86, 64: 67, 65: 68, 66: [1, 69], 69: [2, 55], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 18: 65, 31: [2, 61], 34: 87, 57: 88, 58: 66, 59: [1, 40], 63: 89, 64: 67, 65: 68, 66: [1, 69], 69: [2, 61], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 18: 65, 20: 90, 21: [2, 47], 57: 91, 58: 66, 59: [1, 40], 63: 92, 64: 67, 65: 68, 66: [1, 69], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 31: [1, 93] }, { 31: [2, 74], 59: [2, 74], 66: [2, 74], 74: [2, 74], 75: [2, 74], 76: [2, 74], 77: [2, 74], 78: [2, 74], 79: [2, 74] }, { 31: [2, 76] }, { 21: [2, 24], 31: [2, 24], 52: [2, 24], 59: [2, 24], 62: [2, 24], 66: [2, 24], 69: [2, 24], 74: [2, 24], 75: [2, 24], 76: [2, 24], 77: [2, 24], 78: [2, 24], 79: [2, 24] }, { 21: [2, 25], 31: [2, 25], 52: [2, 25], 59: [2, 25], 62: [2, 25], 66: [2, 25], 69: [2, 25], 74: [2, 25], 75: [2, 25], 76: [2, 25], 77: [2, 25], 78: [2, 25], 79: [2, 25] }, { 21: [2, 27], 31: [2, 27], 52: [2, 27], 62: [2, 27], 65: 94, 66: [1, 95], 69: [2, 27] }, { 21: [2, 89], 31: [2, 89], 52: [2, 89], 62: [2, 89], 66: [2, 89], 69: [2, 89] }, { 21: [2, 42], 31: [2, 42], 52: [2, 42], 59: [2, 42], 62: [2, 42], 66: [2, 42], 67: [1, 96], 69: [2, 42], 74: [2, 42], 75: [2, 42], 76: [2, 42], 77: [2, 42], 78: [2, 42], 79: [2, 42], 81: [2, 42] }, { 21: [2, 41], 31: [2, 41], 52: [2, 41], 59: [2, 41], 62: [2, 41], 66: [2, 41], 69: [2, 41], 74: [2, 41], 75: [2, 41], 76: [2, 41], 77: [2, 41], 78: [2, 41], 79: [2, 41], 81: [2, 41] }, { 52: [1, 97] }, { 52: [2, 78], 59: [2, 78], 66: [2, 78], 74: [2, 78], 75: [2, 78], 76: [2, 78], 77: [2, 78], 78: [2, 78], 79: [2, 78] }, { 52: [2, 80] }, { 5: [2, 12], 13: [2, 12], 14: [2, 12], 17: [2, 12], 27: [2, 12], 32: [2, 12], 37: [2, 12], 42: [2, 12], 45: [2, 12], 46: [2, 12], 49: [2, 12], 53: [2, 12] }, { 18: 98, 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 36: 50, 37: [1, 52], 41: 51, 42: [1, 53], 43: 100, 44: 99, 45: [2, 71] }, { 31: [2, 65], 38: 101, 59: [2, 65], 66: [2, 65], 69: [2, 65], 74: [2, 65], 75: [2, 65], 76: [2, 65], 77: [2, 65], 78: [2, 65], 79: [2, 65] }, { 45: [2, 17] }, { 5: [2, 13], 13: [2, 13], 14: [2, 13], 17: [2, 13], 27: [2, 13], 32: [2, 13], 37: [2, 13], 42: [2, 13], 45: [2, 13], 46: [2, 13], 49: [2, 13], 53: [2, 13] }, { 31: [1, 102] }, { 31: [2, 82], 59: [2, 82], 66: [2, 82], 74: [2, 82], 75: [2, 82], 76: [2, 82], 77: [2, 82], 78: [2, 82], 79: [2, 82] }, { 31: [2, 84] }, { 18: 65, 57: 104, 58: 66, 59: [1, 40], 61: 103, 62: [2, 87], 63: 105, 64: 67, 65: 68, 66: [1, 69], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 30: 106, 31: [2, 57], 68: 107, 69: [1, 108] }, { 31: [2, 54], 59: [2, 54], 66: [2, 54], 69: [2, 54], 74: [2, 54], 75: [2, 54], 76: [2, 54], 77: [2, 54], 78: [2, 54], 79: [2, 54] }, { 31: [2, 56], 69: [2, 56] }, { 31: [2, 63], 35: 109, 68: 110, 69: [1, 108] }, { 31: [2, 60], 59: [2, 60], 66: [2, 60], 69: [2, 60], 74: [2, 60], 75: [2, 60], 76: [2, 60], 77: [2, 60], 78: [2, 60], 79: [2, 60] }, { 31: [2, 62], 69: [2, 62] }, { 21: [1, 111] }, { 21: [2, 46], 59: [2, 46], 66: [2, 46], 74: [2, 46], 75: [2, 46], 76: [2, 46], 77: [2, 46], 78: [2, 46], 79: [2, 46] }, { 21: [2, 48] }, { 5: [2, 21], 13: [2, 21], 14: [2, 21], 17: [2, 21], 27: [2, 21], 32: [2, 21], 37: [2, 21], 42: [2, 21], 45: [2, 21], 46: [2, 21], 49: [2, 21], 53: [2, 21] }, { 21: [2, 90], 31: [2, 90], 52: [2, 90], 62: [2, 90], 66: [2, 90], 69: [2, 90] }, { 67: [1, 96] }, { 18: 65, 57: 112, 58: 66, 59: [1, 40], 66: [1, 32], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 5: [2, 22], 13: [2, 22], 14: [2, 22], 17: [2, 22], 27: [2, 22], 32: [2, 22], 37: [2, 22], 42: [2, 22], 45: [2, 22], 46: [2, 22], 49: [2, 22], 53: [2, 22] }, { 31: [1, 113] }, { 45: [2, 18] }, { 45: [2, 72] }, { 18: 65, 31: [2, 67], 39: 114, 57: 115, 58: 66, 59: [1, 40], 63: 116, 64: 67, 65: 68, 66: [1, 69], 69: [2, 67], 72: 23, 73: 24, 74: [1, 25], 75: [1, 26], 76: [1, 27], 77: [1, 28], 78: [1, 29], 79: [1, 31], 80: 30 }, { 5: [2, 23], 13: [2, 23], 14: [2, 23], 17: [2, 23], 27: [2, 23], 32: [2, 23], 37: [2, 23], 42: [2, 23], 45: [2, 23], 46: [2, 23], 49: [2, 23], 53: [2, 23] }, { 62: [1, 117] }, { 59: [2, 86], 62: [2, 86], 66: [2, 86], 74: [2, 86], 75: [2, 86], 76: [2, 86], 77: [2, 86], 78: [2, 86], 79: [2, 86] }, { 62: [2, 88] }, { 31: [1, 118] }, { 31: [2, 58] }, { 66: [1, 120], 70: 119 }, { 31: [1, 121] }, { 31: [2, 64] }, { 14: [2, 11] }, { 21: [2, 28], 31: [2, 28], 52: [2, 28], 62: [2, 28], 66: [2, 28], 69: [2, 28] }, { 5: [2, 20], 13: [2, 20], 14: [2, 20], 17: [2, 20], 27: [2, 20], 32: [2, 20], 37: [2, 20], 42: [2, 20], 45: [2, 20], 46: [2, 20], 49: [2, 20], 53: [2, 20] }, { 31: [2, 69], 40: 122, 68: 123, 69: [1, 108] }, { 31: [2, 66], 59: [2, 66], 66: [2, 66], 69: [2, 66], 74: [2, 66], 75: [2, 66], 76: [2, 66], 77: [2, 66], 78: [2, 66], 79: [2, 66] }, { 31: [2, 68], 69: [2, 68] }, { 21: [2, 26], 31: [2, 26], 52: [2, 26], 59: [2, 26], 62: [2, 26], 66: [2, 26], 69: [2, 26], 74: [2, 26], 75: [2, 26], 76: [2, 26], 77: [2, 26], 78: [2, 26], 79: [2, 26] }, { 13: [2, 14], 14: [2, 14], 17: [2, 14], 27: [2, 14], 32: [2, 14], 37: [2, 14], 42: [2, 14], 45: [2, 14], 46: [2, 14], 49: [2, 14], 53: [2, 14] }, { 66: [1, 125], 71: [1, 124] }, { 66: [2, 91], 71: [2, 91] }, { 13: [2, 15], 14: [2, 15], 17: [2, 15], 27: [2, 15], 32: [2, 15], 42: [2, 15], 45: [2, 15], 46: [2, 15], 49: [2, 15], 53: [2, 15] }, { 31: [1, 126] }, { 31: [2, 70] }, { 31: [2, 29] }, { 66: [2, 92], 71: [2, 92] }, { 13: [2, 16], 14: [2, 16], 17: [2, 16], 27: [2, 16], 32: [2, 16], 37: [2, 16], 42: [2, 16], 45: [2, 16], 46: [2, 16], 49: [2, 16], 53: [2, 16] }],
	        defaultActions: { 4: [2, 1], 49: [2, 50], 51: [2, 19], 55: [2, 52], 64: [2, 76], 73: [2, 80], 78: [2, 17], 82: [2, 84], 92: [2, 48], 99: [2, 18], 100: [2, 72], 105: [2, 88], 107: [2, 58], 110: [2, 64], 111: [2, 11], 123: [2, 70], 124: [2, 29] },
	        parseError: function parseError(str, hash) {
	            throw new Error(str);
	        },
	        parse: function parse(input) {
	            var self = this,
	                stack = [0],
	                vstack = [null],
	                lstack = [],
	                table = this.table,
	                yytext = "",
	                yylineno = 0,
	                yyleng = 0,
	                recovering = 0,
	                TERROR = 2,
	                EOF = 1;
	            this.lexer.setInput(input);
	            this.lexer.yy = this.yy;
	            this.yy.lexer = this.lexer;
	            this.yy.parser = this;
	            if (typeof this.lexer.yylloc == "undefined") this.lexer.yylloc = {};
	            var yyloc = this.lexer.yylloc;
	            lstack.push(yyloc);
	            var ranges = this.lexer.options && this.lexer.options.ranges;
	            if (typeof this.yy.parseError === "function") this.parseError = this.yy.parseError;
	            function popStack(n) {
	                stack.length = stack.length - 2 * n;
	                vstack.length = vstack.length - n;
	                lstack.length = lstack.length - n;
	            }
	            function lex() {
	                var token;
	                token = self.lexer.lex() || 1;
	                if (typeof token !== "number") {
	                    token = self.symbols_[token] || token;
	                }
	                return token;
	            }
	            var symbol,
	                preErrorSymbol,
	                state,
	                action,
	                a,
	                r,
	                yyval = {},
	                p,
	                len,
	                newState,
	                expected;
	            while (true) {
	                state = stack[stack.length - 1];
	                if (this.defaultActions[state]) {
	                    action = this.defaultActions[state];
	                } else {
	                    if (symbol === null || typeof symbol == "undefined") {
	                        symbol = lex();
	                    }
	                    action = table[state] && table[state][symbol];
	                }
	                if (typeof action === "undefined" || !action.length || !action[0]) {
	                    var errStr = "";
	                    if (!recovering) {
	                        expected = [];
	                        for (p in table[state]) if (this.terminals_[p] && p > 2) {
	                            expected.push("'" + this.terminals_[p] + "'");
	                        }
	                        if (this.lexer.showPosition) {
	                            errStr = "Parse error on line " + (yylineno + 1) + ":\n" + this.lexer.showPosition() + "\nExpecting " + expected.join(", ") + ", got '" + (this.terminals_[symbol] || symbol) + "'";
	                        } else {
	                            errStr = "Parse error on line " + (yylineno + 1) + ": Unexpected " + (symbol == 1 ? "end of input" : "'" + (this.terminals_[symbol] || symbol) + "'");
	                        }
	                        this.parseError(errStr, { text: this.lexer.match, token: this.terminals_[symbol] || symbol, line: this.lexer.yylineno, loc: yyloc, expected: expected });
	                    }
	                }
	                if (action[0] instanceof Array && action.length > 1) {
	                    throw new Error("Parse Error: multiple actions possible at state: " + state + ", token: " + symbol);
	                }
	                switch (action[0]) {
	                    case 1:
	                        stack.push(symbol);
	                        vstack.push(this.lexer.yytext);
	                        lstack.push(this.lexer.yylloc);
	                        stack.push(action[1]);
	                        symbol = null;
	                        if (!preErrorSymbol) {
	                            yyleng = this.lexer.yyleng;
	                            yytext = this.lexer.yytext;
	                            yylineno = this.lexer.yylineno;
	                            yyloc = this.lexer.yylloc;
	                            if (recovering > 0) recovering--;
	                        } else {
	                            symbol = preErrorSymbol;
	                            preErrorSymbol = null;
	                        }
	                        break;
	                    case 2:
	                        len = this.productions_[action[1]][1];
	                        yyval.$ = vstack[vstack.length - len];
	                        yyval._$ = { first_line: lstack[lstack.length - (len || 1)].first_line, last_line: lstack[lstack.length - 1].last_line, first_column: lstack[lstack.length - (len || 1)].first_column, last_column: lstack[lstack.length - 1].last_column };
	                        if (ranges) {
	                            yyval._$.range = [lstack[lstack.length - (len || 1)].range[0], lstack[lstack.length - 1].range[1]];
	                        }
	                        r = this.performAction.call(yyval, yytext, yyleng, yylineno, this.yy, action[1], vstack, lstack);
	                        if (typeof r !== "undefined") {
	                            return r;
	                        }
	                        if (len) {
	                            stack = stack.slice(0, -1 * len * 2);
	                            vstack = vstack.slice(0, -1 * len);
	                            lstack = lstack.slice(0, -1 * len);
	                        }
	                        stack.push(this.productions_[action[1]][0]);
	                        vstack.push(yyval.$);
	                        lstack.push(yyval._$);
	                        newState = table[stack[stack.length - 2]][stack[stack.length - 1]];
	                        stack.push(newState);
	                        break;
	                    case 3:
	                        return true;
	                }
	            }
	            return true;
	        }
	    };
	    /* Jison generated lexer */
	    var lexer = (function () {
	        var lexer = { EOF: 1,
	            parseError: function parseError(str, hash) {
	                if (this.yy.parser) {
	                    this.yy.parser.parseError(str, hash);
	                } else {
	                    throw new Error(str);
	                }
	            },
	            setInput: function setInput(input) {
	                this._input = input;
	                this._more = this._less = this.done = false;
	                this.yylineno = this.yyleng = 0;
	                this.yytext = this.matched = this.match = "";
	                this.conditionStack = ["INITIAL"];
	                this.yylloc = { first_line: 1, first_column: 0, last_line: 1, last_column: 0 };
	                if (this.options.ranges) this.yylloc.range = [0, 0];
	                this.offset = 0;
	                return this;
	            },
	            input: function input() {
	                var ch = this._input[0];
	                this.yytext += ch;
	                this.yyleng++;
	                this.offset++;
	                this.match += ch;
	                this.matched += ch;
	                var lines = ch.match(/(?:\r\n?|\n).*/g);
	                if (lines) {
	                    this.yylineno++;
	                    this.yylloc.last_line++;
	                } else {
	                    this.yylloc.last_column++;
	                }
	                if (this.options.ranges) this.yylloc.range[1]++;

	                this._input = this._input.slice(1);
	                return ch;
	            },
	            unput: function unput(ch) {
	                var len = ch.length;
	                var lines = ch.split(/(?:\r\n?|\n)/g);

	                this._input = ch + this._input;
	                this.yytext = this.yytext.substr(0, this.yytext.length - len - 1);
	                //this.yyleng -= len;
	                this.offset -= len;
	                var oldLines = this.match.split(/(?:\r\n?|\n)/g);
	                this.match = this.match.substr(0, this.match.length - 1);
	                this.matched = this.matched.substr(0, this.matched.length - 1);

	                if (lines.length - 1) this.yylineno -= lines.length - 1;
	                var r = this.yylloc.range;

	                this.yylloc = { first_line: this.yylloc.first_line,
	                    last_line: this.yylineno + 1,
	                    first_column: this.yylloc.first_column,
	                    last_column: lines ? (lines.length === oldLines.length ? this.yylloc.first_column : 0) + oldLines[oldLines.length - lines.length].length - lines[0].length : this.yylloc.first_column - len
	                };

	                if (this.options.ranges) {
	                    this.yylloc.range = [r[0], r[0] + this.yyleng - len];
	                }
	                return this;
	            },
	            more: function more() {
	                this._more = true;
	                return this;
	            },
	            less: function less(n) {
	                this.unput(this.match.slice(n));
	            },
	            pastInput: function pastInput() {
	                var past = this.matched.substr(0, this.matched.length - this.match.length);
	                return (past.length > 20 ? "..." : "") + past.substr(-20).replace(/\n/g, "");
	            },
	            upcomingInput: function upcomingInput() {
	                var next = this.match;
	                if (next.length < 20) {
	                    next += this._input.substr(0, 20 - next.length);
	                }
	                return (next.substr(0, 20) + (next.length > 20 ? "..." : "")).replace(/\n/g, "");
	            },
	            showPosition: function showPosition() {
	                var pre = this.pastInput();
	                var c = new Array(pre.length + 1).join("-");
	                return pre + this.upcomingInput() + "\n" + c + "^";
	            },
	            next: function next() {
	                if (this.done) {
	                    return this.EOF;
	                }
	                if (!this._input) this.done = true;

	                var token, match, tempMatch, index, col, lines;
	                if (!this._more) {
	                    this.yytext = "";
	                    this.match = "";
	                }
	                var rules = this._currentRules();
	                for (var i = 0; i < rules.length; i++) {
	                    tempMatch = this._input.match(this.rules[rules[i]]);
	                    if (tempMatch && (!match || tempMatch[0].length > match[0].length)) {
	                        match = tempMatch;
	                        index = i;
	                        if (!this.options.flex) break;
	                    }
	                }
	                if (match) {
	                    lines = match[0].match(/(?:\r\n?|\n).*/g);
	                    if (lines) this.yylineno += lines.length;
	                    this.yylloc = { first_line: this.yylloc.last_line,
	                        last_line: this.yylineno + 1,
	                        first_column: this.yylloc.last_column,
	                        last_column: lines ? lines[lines.length - 1].length - lines[lines.length - 1].match(/\r?\n?/)[0].length : this.yylloc.last_column + match[0].length };
	                    this.yytext += match[0];
	                    this.match += match[0];
	                    this.matches = match;
	                    this.yyleng = this.yytext.length;
	                    if (this.options.ranges) {
	                        this.yylloc.range = [this.offset, this.offset += this.yyleng];
	                    }
	                    this._more = false;
	                    this._input = this._input.slice(match[0].length);
	                    this.matched += match[0];
	                    token = this.performAction.call(this, this.yy, this, rules[index], this.conditionStack[this.conditionStack.length - 1]);
	                    if (this.done && this._input) this.done = false;
	                    if (token) {
	                        return token;
	                    } else {
	                        return;
	                    }
	                }
	                if (this._input === "") {
	                    return this.EOF;
	                } else {
	                    return this.parseError("Lexical error on line " + (this.yylineno + 1) + ". Unrecognized text.\n" + this.showPosition(), { text: "", token: null, line: this.yylineno });
	                }
	            },
	            lex: function lex() {
	                var r = this.next();
	                if (typeof r !== "undefined") {
	                    return r;
	                } else {
	                    return this.lex();
	                }
	            },
	            begin: function begin(condition) {
	                this.conditionStack.push(condition);
	            },
	            popState: function popState() {
	                return this.conditionStack.pop();
	            },
	            _currentRules: function _currentRules() {
	                return this.conditions[this.conditionStack[this.conditionStack.length - 1]].rules;
	            },
	            topState: function topState() {
	                return this.conditionStack[this.conditionStack.length - 2];
	            },
	            pushState: function begin(condition) {
	                this.begin(condition);
	            } };
	        lexer.options = {};
	        lexer.performAction = function anonymous(yy, yy_, $avoiding_name_collisions, YY_START) {

	            function strip(start, end) {
	                return yy_.yytext = yy_.yytext.substr(start, yy_.yyleng - end);
	            }

	            var YYSTATE = YY_START;
	            switch ($avoiding_name_collisions) {
	                case 0:
	                    if (yy_.yytext.slice(-2) === "\\\\") {
	                        strip(0, 1);
	                        this.begin("mu");
	                    } else if (yy_.yytext.slice(-1) === "\\") {
	                        strip(0, 1);
	                        this.begin("emu");
	                    } else {
	                        this.begin("mu");
	                    }
	                    if (yy_.yytext) {
	                        return 14;
	                    }break;
	                case 1:
	                    return 14;
	                    break;
	                case 2:
	                    this.popState();
	                    return 14;

	                    break;
	                case 3:
	                    yy_.yytext = yy_.yytext.substr(5, yy_.yyleng - 9);
	                    this.popState();
	                    return 16;

	                    break;
	                case 4:
	                    return 14;
	                    break;
	                case 5:
	                    this.popState();
	                    return 13;

	                    break;
	                case 6:
	                    return 59;
	                    break;
	                case 7:
	                    return 62;
	                    break;
	                case 8:
	                    return 17;
	                    break;
	                case 9:
	                    this.popState();
	                    this.begin("raw");
	                    return 21;

	                    break;
	                case 10:
	                    return 53;
	                    break;
	                case 11:
	                    return 27;
	                    break;
	                case 12:
	                    return 45;
	                    break;
	                case 13:
	                    this.popState();return 42;
	                    break;
	                case 14:
	                    this.popState();return 42;
	                    break;
	                case 15:
	                    return 32;
	                    break;
	                case 16:
	                    return 37;
	                    break;
	                case 17:
	                    return 49;
	                    break;
	                case 18:
	                    return 46;
	                    break;
	                case 19:
	                    this.unput(yy_.yytext);
	                    this.popState();
	                    this.begin("com");

	                    break;
	                case 20:
	                    this.popState();
	                    return 13;

	                    break;
	                case 21:
	                    return 46;
	                    break;
	                case 22:
	                    return 67;
	                    break;
	                case 23:
	                    return 66;
	                    break;
	                case 24:
	                    return 66;
	                    break;
	                case 25:
	                    return 81;
	                    break;
	                case 26:
	                    // ignore whitespace
	                    break;
	                case 27:
	                    this.popState();return 52;
	                    break;
	                case 28:
	                    this.popState();return 31;
	                    break;
	                case 29:
	                    yy_.yytext = strip(1, 2).replace(/\\"/g, "\"");return 74;
	                    break;
	                case 30:
	                    yy_.yytext = strip(1, 2).replace(/\\'/g, "'");return 74;
	                    break;
	                case 31:
	                    return 79;
	                    break;
	                case 32:
	                    return 76;
	                    break;
	                case 33:
	                    return 76;
	                    break;
	                case 34:
	                    return 77;
	                    break;
	                case 35:
	                    return 78;
	                    break;
	                case 36:
	                    return 75;
	                    break;
	                case 37:
	                    return 69;
	                    break;
	                case 38:
	                    return 71;
	                    break;
	                case 39:
	                    return 66;
	                    break;
	                case 40:
	                    return 66;
	                    break;
	                case 41:
	                    return "INVALID";
	                    break;
	                case 42:
	                    return 5;
	                    break;
	            }
	        };
	        lexer.rules = [/^(?:[^\x00]*?(?=(\{\{)))/, /^(?:[^\x00]+)/, /^(?:[^\x00]{2,}?(?=(\{\{|\\\{\{|\\\\\{\{|$)))/, /^(?:\{\{\{\{\/[^\s!"#%-,\.\/;->@\[-\^`\{-~]+(?=[=}\s\/.])\}\}\}\})/, /^(?:[^\x00]*?(?=(\{\{\{\{\/)))/, /^(?:[\s\S]*?--(~)?\}\})/, /^(?:\()/, /^(?:\))/, /^(?:\{\{\{\{)/, /^(?:\}\}\}\})/, /^(?:\{\{(~)?>)/, /^(?:\{\{(~)?#)/, /^(?:\{\{(~)?\/)/, /^(?:\{\{(~)?\^\s*(~)?\}\})/, /^(?:\{\{(~)?\s*else\s*(~)?\}\})/, /^(?:\{\{(~)?\^)/, /^(?:\{\{(~)?\s*else\b)/, /^(?:\{\{(~)?\{)/, /^(?:\{\{(~)?&)/, /^(?:\{\{(~)?!--)/, /^(?:\{\{(~)?![\s\S]*?\}\})/, /^(?:\{\{(~)?)/, /^(?:=)/, /^(?:\.\.)/, /^(?:\.(?=([=~}\s\/.)|])))/, /^(?:[\/.])/, /^(?:\s+)/, /^(?:\}(~)?\}\})/, /^(?:(~)?\}\})/, /^(?:"(\\["]|[^"])*")/, /^(?:'(\\[']|[^'])*')/, /^(?:@)/, /^(?:true(?=([~}\s)])))/, /^(?:false(?=([~}\s)])))/, /^(?:undefined(?=([~}\s)])))/, /^(?:null(?=([~}\s)])))/, /^(?:-?[0-9]+(?:\.[0-9]+)?(?=([~}\s)])))/, /^(?:as\s+\|)/, /^(?:\|)/, /^(?:([^\s!"#%-,\.\/;->@\[-\^`\{-~]+(?=([=~}\s\/.)|]))))/, /^(?:\[[^\]]*\])/, /^(?:.)/, /^(?:$)/];
	        lexer.conditions = { mu: { rules: [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42], inclusive: false }, emu: { rules: [2], inclusive: false }, com: { rules: [5], inclusive: false }, raw: { rules: [3, 4], inclusive: false }, INITIAL: { rules: [0, 1, 42], inclusive: true } };
	        return lexer;
	    })();
	    parser.lexer = lexer;
	    function Parser() {
	        this.yy = {};
	    }Parser.prototype = parser;parser.Parser = Parser;
	    return new Parser();
	})();exports["default"] = handlebars;
	module.exports = exports["default"];

/***/ },
/* 15 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;

	var _Visitor = __webpack_require__(6);

	var _Visitor2 = _interopRequireWildcard(_Visitor);

	function WhitespaceControl() {}
	WhitespaceControl.prototype = new _Visitor2['default']();

	WhitespaceControl.prototype.Program = function (program) {
	  var isRoot = !this.isRootSeen;
	  this.isRootSeen = true;

	  var body = program.body;
	  for (var i = 0, l = body.length; i < l; i++) {
	    var current = body[i],
	        strip = this.accept(current);

	    if (!strip) {
	      continue;
	    }

	    var _isPrevWhitespace = isPrevWhitespace(body, i, isRoot),
	        _isNextWhitespace = isNextWhitespace(body, i, isRoot),
	        openStandalone = strip.openStandalone && _isPrevWhitespace,
	        closeStandalone = strip.closeStandalone && _isNextWhitespace,
	        inlineStandalone = strip.inlineStandalone && _isPrevWhitespace && _isNextWhitespace;

	    if (strip.close) {
	      omitRight(body, i, true);
	    }
	    if (strip.open) {
	      omitLeft(body, i, true);
	    }

	    if (inlineStandalone) {
	      omitRight(body, i);

	      if (omitLeft(body, i)) {
	        // If we are on a standalone node, save the indent info for partials
	        if (current.type === 'PartialStatement') {
	          // Pull out the whitespace from the final line
	          current.indent = /([ \t]+$)/.exec(body[i - 1].original)[1];
	        }
	      }
	    }
	    if (openStandalone) {
	      omitRight((current.program || current.inverse).body);

	      // Strip out the previous content node if it's whitespace only
	      omitLeft(body, i);
	    }
	    if (closeStandalone) {
	      // Always strip the next node
	      omitRight(body, i);

	      omitLeft((current.inverse || current.program).body);
	    }
	  }

	  return program;
	};
	WhitespaceControl.prototype.BlockStatement = function (block) {
	  this.accept(block.program);
	  this.accept(block.inverse);

	  // Find the inverse program that is involed with whitespace stripping.
	  var program = block.program || block.inverse,
	      inverse = block.program && block.inverse,
	      firstInverse = inverse,
	      lastInverse = inverse;

	  if (inverse && inverse.chained) {
	    firstInverse = inverse.body[0].program;

	    // Walk the inverse chain to find the last inverse that is actually in the chain.
	    while (lastInverse.chained) {
	      lastInverse = lastInverse.body[lastInverse.body.length - 1].program;
	    }
	  }

	  var strip = {
	    open: block.openStrip.open,
	    close: block.closeStrip.close,

	    // Determine the standalone candiacy. Basically flag our content as being possibly standalone
	    // so our parent can determine if we actually are standalone
	    openStandalone: isNextWhitespace(program.body),
	    closeStandalone: isPrevWhitespace((firstInverse || program).body)
	  };

	  if (block.openStrip.close) {
	    omitRight(program.body, null, true);
	  }

	  if (inverse) {
	    var inverseStrip = block.inverseStrip;

	    if (inverseStrip.open) {
	      omitLeft(program.body, null, true);
	    }

	    if (inverseStrip.close) {
	      omitRight(firstInverse.body, null, true);
	    }
	    if (block.closeStrip.open) {
	      omitLeft(lastInverse.body, null, true);
	    }

	    // Find standalone else statments
	    if (isPrevWhitespace(program.body) && isNextWhitespace(firstInverse.body)) {
	      omitLeft(program.body);
	      omitRight(firstInverse.body);
	    }
	  } else if (block.closeStrip.open) {
	    omitLeft(program.body, null, true);
	  }

	  return strip;
	};

	WhitespaceControl.prototype.MustacheStatement = function (mustache) {
	  return mustache.strip;
	};

	WhitespaceControl.prototype.PartialStatement = WhitespaceControl.prototype.CommentStatement = function (node) {
	  /* istanbul ignore next */
	  var strip = node.strip || {};
	  return {
	    inlineStandalone: true,
	    open: strip.open,
	    close: strip.close
	  };
	};

	function isPrevWhitespace(body, i, isRoot) {
	  if (i === undefined) {
	    i = body.length;
	  }

	  // Nodes that end with newlines are considered whitespace (but are special
	  // cased for strip operations)
	  var prev = body[i - 1],
	      sibling = body[i - 2];
	  if (!prev) {
	    return isRoot;
	  }

	  if (prev.type === 'ContentStatement') {
	    return (sibling || !isRoot ? /\r?\n\s*?$/ : /(^|\r?\n)\s*?$/).test(prev.original);
	  }
	}
	function isNextWhitespace(body, i, isRoot) {
	  if (i === undefined) {
	    i = -1;
	  }

	  var next = body[i + 1],
	      sibling = body[i + 2];
	  if (!next) {
	    return isRoot;
	  }

	  if (next.type === 'ContentStatement') {
	    return (sibling || !isRoot ? /^\s*?\r?\n/ : /^\s*?(\r?\n|$)/).test(next.original);
	  }
	}

	// Marks the node to the right of the position as omitted.
	// I.e. {{foo}}' ' will mark the ' ' node as omitted.
	//
	// If i is undefined, then the first child will be marked as such.
	//
	// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
	// content is met.
	function omitRight(body, i, multiple) {
	  var current = body[i == null ? 0 : i + 1];
	  if (!current || current.type !== 'ContentStatement' || !multiple && current.rightStripped) {
	    return;
	  }

	  var original = current.value;
	  current.value = current.value.replace(multiple ? /^\s+/ : /^[ \t]*\r?\n?/, '');
	  current.rightStripped = current.value !== original;
	}

	// Marks the node to the left of the position as omitted.
	// I.e. ' '{{foo}} will mark the ' ' node as omitted.
	//
	// If i is undefined then the last child will be marked as such.
	//
	// If mulitple is truthy then all whitespace will be stripped out until non-whitespace
	// content is met.
	function omitLeft(body, i, multiple) {
	  var current = body[i == null ? body.length - 1 : i - 1];
	  if (!current || current.type !== 'ContentStatement' || !multiple && current.leftStripped) {
	    return;
	  }

	  // We omit the last node if it's whitespace only and not preceeded by a non-content node.
	  var original = current.value;
	  current.value = current.value.replace(multiple ? /\s+$/ : /[ \t]+$/, '');
	  current.leftStripped = current.value !== original;
	  return current.leftStripped;
	}

	exports['default'] = WhitespaceControl;
	module.exports = exports['default'];

/***/ },
/* 16 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _interopRequireWildcard = __webpack_require__(8)['default'];

	exports.__esModule = true;
	exports.SourceLocation = SourceLocation;
	exports.id = id;
	exports.stripFlags = stripFlags;
	exports.stripComment = stripComment;
	exports.preparePath = preparePath;
	exports.prepareMustache = prepareMustache;
	exports.prepareRawBlock = prepareRawBlock;
	exports.prepareBlock = prepareBlock;

	var _Exception = __webpack_require__(11);

	var _Exception2 = _interopRequireWildcard(_Exception);

	function SourceLocation(source, locInfo) {
	  this.source = source;
	  this.start = {
	    line: locInfo.first_line,
	    column: locInfo.first_column
	  };
	  this.end = {
	    line: locInfo.last_line,
	    column: locInfo.last_column
	  };
	}

	function id(token) {
	  if (/^\[.*\]$/.test(token)) {
	    return token.substr(1, token.length - 2);
	  } else {
	    return token;
	  }
	}

	function stripFlags(open, close) {
	  return {
	    open: open.charAt(2) === '~',
	    close: close.charAt(close.length - 3) === '~'
	  };
	}

	function stripComment(comment) {
	  return comment.replace(/^\{\{~?\!-?-?/, '').replace(/-?-?~?\}\}$/, '');
	}

	function preparePath(data, parts, locInfo) {
	  locInfo = this.locInfo(locInfo);

	  var original = data ? '@' : '',
	      dig = [],
	      depth = 0,
	      depthString = '';

	  for (var i = 0, l = parts.length; i < l; i++) {
	    var part = parts[i].part,

	    // If we have [] syntax then we do not treat path references as operators,
	    // i.e. foo.[this] resolves to approximately context.foo['this']
	    isLiteral = parts[i].original !== part;
	    original += (parts[i].separator || '') + part;

	    if (!isLiteral && (part === '..' || part === '.' || part === 'this')) {
	      if (dig.length > 0) {
	        throw new _Exception2['default']('Invalid path: ' + original, { loc: locInfo });
	      } else if (part === '..') {
	        depth++;
	        depthString += '../';
	      }
	    } else {
	      dig.push(part);
	    }
	  }

	  return new this.PathExpression(data, depth, dig, original, locInfo);
	}

	function prepareMustache(path, params, hash, open, strip, locInfo) {
	  // Must use charAt to support IE pre-10
	  var escapeFlag = open.charAt(3) || open.charAt(2),
	      escaped = escapeFlag !== '{' && escapeFlag !== '&';

	  return new this.MustacheStatement(path, params, hash, escaped, strip, this.locInfo(locInfo));
	}

	function prepareRawBlock(openRawBlock, content, close, locInfo) {
	  if (openRawBlock.path.original !== close) {
	    var errorNode = { loc: openRawBlock.path.loc };

	    throw new _Exception2['default'](openRawBlock.path.original + ' doesn\'t match ' + close, errorNode);
	  }

	  locInfo = this.locInfo(locInfo);
	  var program = new this.Program([content], null, {}, locInfo);

	  return new this.BlockStatement(openRawBlock.path, openRawBlock.params, openRawBlock.hash, program, undefined, {}, {}, {}, locInfo);
	}

	function prepareBlock(openBlock, program, inverseAndProgram, close, inverted, locInfo) {
	  // When we are chaining inverse calls, we will not have a close path
	  if (close && close.path && openBlock.path.original !== close.path.original) {
	    var errorNode = { loc: openBlock.path.loc };

	    throw new _Exception2['default'](openBlock.path.original + ' doesn\'t match ' + close.path.original, errorNode);
	  }

	  program.blockParams = openBlock.blockParams;

	  var inverse = undefined,
	      inverseStrip = undefined;

	  if (inverseAndProgram) {
	    if (inverseAndProgram.chain) {
	      inverseAndProgram.program.body[0].closeStrip = close.strip;
	    }

	    inverseStrip = inverseAndProgram.strip;
	    inverse = inverseAndProgram.program;
	  }

	  if (inverted) {
	    inverted = inverse;
	    inverse = program;
	    program = inverted;
	  }

	  return new this.BlockStatement(openBlock.path, openBlock.params, openBlock.hash, program, inverse, openBlock.strip, inverseStrip, close && close.strip, this.locInfo(locInfo));
	}

/***/ },
/* 17 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	exports.__esModule = true;
	/*global define */

	var _isArray = __webpack_require__(12);

	var SourceNode = undefined;

	try {
	  /* istanbul ignore next */
	  if (false) {
	    // We don't support this in AMD environments. For these environments, we asusme that
	    // they are running on the browser and thus have no need for the source-map library.
	    var SourceMap = require('source-map');
	    SourceNode = SourceMap.SourceNode;
	  }
	} catch (err) {}

	/* istanbul ignore if: tested but not covered in istanbul due to dist build  */
	if (!SourceNode) {
	  SourceNode = function (line, column, srcFile, chunks) {
	    this.src = '';
	    if (chunks) {
	      this.add(chunks);
	    }
	  };
	  /* istanbul ignore next */
	  SourceNode.prototype = {
	    add: function add(chunks) {
	      if (_isArray.isArray(chunks)) {
	        chunks = chunks.join('');
	      }
	      this.src += chunks;
	    },
	    prepend: function prepend(chunks) {
	      if (_isArray.isArray(chunks)) {
	        chunks = chunks.join('');
	      }
	      this.src = chunks + this.src;
	    },
	    toStringWithSourceMap: function toStringWithSourceMap() {
	      return { code: this.toString() };
	    },
	    toString: function toString() {
	      return this.src;
	    }
	  };
	}

	function castChunk(chunk, codeGen, loc) {
	  if (_isArray.isArray(chunk)) {
	    var ret = [];

	    for (var i = 0, len = chunk.length; i < len; i++) {
	      ret.push(codeGen.wrap(chunk[i], loc));
	    }
	    return ret;
	  } else if (typeof chunk === 'boolean' || typeof chunk === 'number') {
	    // Handle primitives that the SourceNode will throw up on
	    return chunk + '';
	  }
	  return chunk;
	}

	function CodeGen(srcFile) {
	  this.srcFile = srcFile;
	  this.source = [];
	}

	CodeGen.prototype = {
	  prepend: function prepend(source, loc) {
	    this.source.unshift(this.wrap(source, loc));
	  },
	  push: function push(source, loc) {
	    this.source.push(this.wrap(source, loc));
	  },

	  merge: function merge() {
	    var source = this.empty();
	    this.each(function (line) {
	      source.add(['  ', line, '\n']);
	    });
	    return source;
	  },

	  each: function each(iter) {
	    for (var i = 0, len = this.source.length; i < len; i++) {
	      iter(this.source[i]);
	    }
	  },

	  empty: function empty() {
	    var loc = arguments[0] === undefined ? this.currentLocation || { start: {} } : arguments[0];

	    return new SourceNode(loc.start.line, loc.start.column, this.srcFile);
	  },
	  wrap: function wrap(chunk) {
	    var loc = arguments[1] === undefined ? this.currentLocation || { start: {} } : arguments[1];

	    if (chunk instanceof SourceNode) {
	      return chunk;
	    }

	    chunk = castChunk(chunk, this, loc);

	    return new SourceNode(loc.start.line, loc.start.column, this.srcFile, chunk);
	  },

	  functionCall: function functionCall(fn, type, params) {
	    params = this.generateList(params);
	    return this.wrap([fn, type ? '.' + type + '(' : '(', params, ')']);
	  },

	  quotedString: function quotedString(str) {
	    return '"' + (str + '').replace(/\\/g, '\\\\').replace(/"/g, '\\"').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/\u2028/g, '\\u2028') // Per Ecma-262 7.3 + 7.8.4
	    .replace(/\u2029/g, '\\u2029') + '"';
	  },

	  objectLiteral: function objectLiteral(obj) {
	    var pairs = [];

	    for (var key in obj) {
	      if (obj.hasOwnProperty(key)) {
	        var value = castChunk(obj[key], this);
	        if (value !== 'undefined') {
	          pairs.push([this.quotedString(key), ':', value]);
	        }
	      }
	    }

	    var ret = this.generateList(pairs);
	    ret.prepend('{');
	    ret.add('}');
	    return ret;
	  },

	  generateList: function generateList(entries, loc) {
	    var ret = this.empty(loc);

	    for (var i = 0, len = entries.length; i < len; i++) {
	      if (i) {
	        ret.add(',');
	      }

	      ret.add(castChunk(entries[i], this, loc));
	    }

	    return ret;
	  },

	  generateArray: function generateArray(entries, loc) {
	    var ret = this.generateList(entries, loc);
	    ret.prepend('[');
	    ret.add(']');

	    return ret;
	  }
	};

	exports['default'] = CodeGen;
	module.exports = exports['default'];

	/* NOP */

/***/ }
/******/ ])
});
;
// Vectorizer.
// -----------

// A tiny library for making your live easier when dealing with SVG.
// The only Vectorizer dependency is the Geometry library.

// Copyright © 2012 - 2015 client IO (http://client.io)

(function(root, factory) {

    if (typeof define === 'function' && define.amd) {

        // AMD. Register as an anonymous module.
        define([], factory);

    } else if (typeof exports === 'object') {

        // Node. Does not work with strict CommonJS, but
        // only CommonJS-like environments that support module.exports,
        // like Node.
        module.exports = factory();

    } else {

        // Browser globals.
        root.Vectorizer = root.V = factory();

    }

}(this, function() {

    var SVGsupported = typeof window === 'object' && !!(window.SVGAngle || document.implementation.hasFeature('http://www.w3.org/TR/SVG11/feature#BasicStructure', '1.1'));

    // SVG support is required.
    if (!SVGsupported) return function() {};

    // XML namespaces.
    var ns = {
        xmlns: 'http://www.w3.org/2000/svg',
        xlink: 'http://www.w3.org/1999/xlink'
    };
    // SVG version.
    var SVGversion = '1.1';

    // A function returning a unique identifier for this client session with every call.
    var idCounter = 0;
    function uniqueId() {
        var id = ++idCounter + '';
        return 'v-' + id;
    }

    function isObject(o) {
        return Object(o) === Object(o);
    }

    function isArray(o) {
        return Object.prototype.toString.call(o) == '[object Array]';
    }

    // Create an SVG document element.
    // If `content` is passed, it will be used as the SVG content of the `<svg>` root element.
    function createSvgDocument(content) {

        var svg = '<svg xmlns="' + ns.xmlns + '" xmlns:xlink="' + ns.xlink + '" version="' + SVGversion + '">' + (content || '') + '</svg>';
        var parser = new DOMParser();
        parser.async = false;
        return parser.parseFromString(svg, 'text/xml').documentElement;
    }

    // Create SVG element.
    // -------------------

    function createElement(el, attrs, children) {

        var i, len;

        if (!el) return undefined;

        // If `el` is an object, it is probably a native SVG element. Wrap it to VElement.
        if (typeof el === 'object') {
            return new VElement(el);
        }
        attrs = attrs || {};

        // If `el` is a `'svg'` or `'SVG'` string, create a new SVG canvas.
        if (el.toLowerCase() === 'svg') {

            return new VElement(createSvgDocument());

        } else if (el[0] === '<') {
            // Create element from an SVG string.
            // Allows constructs of type: `document.appendChild(Vectorizer('<rect></rect>').node)`.

            var svgDoc = createSvgDocument(el);

            // Note that `createElement()` might also return an array should the SVG string passed as
            // the first argument contain more then one root element.
            if (svgDoc.childNodes.length > 1) {

                // Map child nodes to `VElement`s.
                var ret = [];
                for (i = 0, len = svgDoc.childNodes.length; i < len; i++) {

                    var childNode = svgDoc.childNodes[i];
                    ret.push(new VElement(document.importNode(childNode, true)));
                }
                return ret;
            }

            return new VElement(document.importNode(svgDoc.firstChild, true));
        }

        el = document.createElementNS(ns.xmlns, el);

        // Set attributes.
        for (var key in attrs) {

            setAttribute(el, key, attrs[key]);
        }

        // Normalize `children` array.
        if (Object.prototype.toString.call(children) != '[object Array]') children = [children];

        // Append children if they are specified.
        for (i = 0, len = (children[0] && children.length) || 0; i < len; i++) {
            var child = children[i];
            el.appendChild(child instanceof VElement ? child.node : child);
        }

        return new VElement(el);
    }

    function setAttribute(el, name, value) {

        if (name.indexOf(':') > -1) {
            // Attribute names can be namespaced. E.g. `image` elements
            // have a `xlink:href` attribute to set the source of the image.
            var combinedKey = name.split(':');
            el.setAttributeNS(ns[combinedKey[0]], combinedKey[1], value);

        } else if (name === 'id') {
            el.id = value;
        } else {
            el.setAttribute(name, value);
        }
    }

    function parseTransformString(transform) {
        var translate,
            rotate,
            scale;

        if (transform) {

            var separator = /[ ,]+/;

            var translateMatch = transform.match(/translate\((.*)\)/);
            if (translateMatch) {
                translate = translateMatch[1].split(separator);
            }
            var rotateMatch = transform.match(/rotate\((.*)\)/);
            if (rotateMatch) {
                rotate = rotateMatch[1].split(separator);
            }
            var scaleMatch = transform.match(/scale\((.*)\)/);
            if (scaleMatch) {
                scale = scaleMatch[1].split(separator);
            }
        }

        var sx = (scale && scale[0]) ? parseFloat(scale[0]) : 1;

        return {
            translate: {
                tx: (translate && translate[0]) ? parseInt(translate[0], 10) : 0,
                ty: (translate && translate[1]) ? parseInt(translate[1], 10) : 0
            },
            rotate: {
                angle: (rotate && rotate[0]) ? parseInt(rotate[0], 10) : 0,
                cx: (rotate && rotate[1]) ? parseInt(rotate[1], 10) : undefined,
                cy: (rotate && rotate[2]) ? parseInt(rotate[2], 10) : undefined
            },
            scale: {
                sx: sx,
                sy: (scale && scale[1]) ? parseFloat(scale[1]) : sx
            }
        };
    }


    // Matrix decomposition.
    // ---------------------

    function deltaTransformPoint(matrix, point) {

        var dx = point.x * matrix.a + point.y * matrix.c + 0;
        var dy = point.x * matrix.b + point.y * matrix.d + 0;
        return { x: dx, y: dy };
    }

    function decomposeMatrix(matrix) {

        // @see https://gist.github.com/2052247

        // calculate delta transform point
        var px = deltaTransformPoint(matrix, { x: 0, y: 1 });
        var py = deltaTransformPoint(matrix, { x: 1, y: 0 });

        // calculate skew
        var skewX = ((180 / Math.PI) * Math.atan2(px.y, px.x) - 90);
        var skewY = ((180 / Math.PI) * Math.atan2(py.y, py.x));

        return {

            translateX: matrix.e,
            translateY: matrix.f,
            scaleX: Math.sqrt(matrix.a * matrix.a + matrix.b * matrix.b),
            scaleY: Math.sqrt(matrix.c * matrix.c + matrix.d * matrix.d),
            skewX: skewX,
            skewY: skewY,
            rotation: skewX // rotation is the same as skew x
        };
    }

    // VElement.
    // ---------

    function VElement(el) {
        if (el instanceof VElement) {
            el = el.node;
        }
        this.node = el;
        if (!this.node.id) {
            this.node.id = uniqueId();
        }
    }

    // VElement public API.
    // --------------------

    VElement.prototype = {

        translate: function(tx, ty, opt) {

            opt = opt || {};
            ty = ty || 0;

            var transformAttr = this.attr('transform') || '';
            var transform = parseTransformString(transformAttr);

            // Is it a getter?
            if (typeof tx === 'undefined') {
                return transform.translate;
            }

            transformAttr = transformAttr.replace(/translate\([^\)]*\)/g, '').trim();

            var newTx = opt.absolute ? tx : transform.translate.tx + tx;
            var newTy = opt.absolute ? ty : transform.translate.ty + ty;
            var newTranslate = 'translate(' + newTx + ',' + newTy + ')';

            // Note that `translate()` is always the first transformation. This is
            // usually the desired case.
            this.attr('transform', (newTranslate + ' ' + transformAttr).trim());
            return this;
        },

        rotate: function(angle, cx, cy, opt) {

            opt = opt || {};

            var transformAttr = this.attr('transform') || '';
            var transform = parseTransformString(transformAttr);

            // Is it a getter?
            if (typeof angle === 'undefined') {
                return transform.rotate;
            }

            transformAttr = transformAttr.replace(/rotate\([^\)]*\)/g, '').trim();

            angle %= 360;

            var newAngle = opt.absolute ? angle : transform.rotate.angle + angle;
            var newOrigin = (cx !== undefined && cy !== undefined) ? ',' + cx + ',' + cy : '';
            var newRotate = 'rotate(' + newAngle + newOrigin + ')';

            this.attr('transform', (transformAttr + ' ' + newRotate).trim());
            return this;
        },

        // Note that `scale` as the only transformation does not combine with previous values.
        scale: function(sx, sy) {
            sy = (typeof sy === 'undefined') ? sx : sy;

            var transformAttr = this.attr('transform') || '';
            var transform = parseTransformString(transformAttr);

            // Is it a getter?
            if (typeof sx === 'undefined') {
                return transform.scale;
            }

            transformAttr = transformAttr.replace(/scale\([^\)]*\)/g, '').trim();

            var newScale = 'scale(' + sx + ',' + sy + ')';

            this.attr('transform', (transformAttr + ' ' + newScale).trim());
            return this;
        },

        // Get SVGRect that contains coordinates and dimension of the real bounding box,
        // i.e. after transformations are applied.
        // If `target` is specified, bounding box will be computed relatively to `target` element.
        bbox: function(withoutTransformations, target) {

            // If the element is not in the live DOM, it does not have a bounding box defined and
            // so fall back to 'zero' dimension element.
            if (!this.node.ownerSVGElement) return { x: 0, y: 0, width: 0, height: 0 };

            var box;
            try {

                box = this.node.getBBox();

                // Opera returns infinite values in some cases.
                // Note that Infinity | 0 produces 0 as opposed to Infinity || 0.
                // We also have to create new object as the standard says that you can't
                // modify the attributes of a bbox.
                box = { x: box.x | 0, y: box.y | 0, width: box.width | 0, height: box.height | 0 };

            } catch (e) {

                // Fallback for IE.
                box = {
                    x: this.node.clientLeft,
                    y: this.node.clientTop,
                    width: this.node.clientWidth,
                    height: this.node.clientHeight
                };
            }

            if (withoutTransformations) {

                return box;
            }

            var matrix = this.node.getTransformToElement(target || this.node.ownerSVGElement);

            return V.transformRect(box, matrix);
        },

        text: function(content, opt) {

            opt = opt || {};
            var lines = content.split('\n');
            var i = 0;
            var tspan;

            // `alignment-baseline` does not work in Firefox.
            // Setting `dominant-baseline` on the `<text>` element doesn't work in IE9.
            // In order to have the 0,0 coordinate of the `<text>` element (or the first `<tspan>`)
            // in the top left corner we translate the `<text>` element by `0.8em`.
            // See `http://www.w3.org/Graphics/SVG/WG/wiki/How_to_determine_dominant_baseline`.
            // See also `http://apike.ca/prog_svg_text_style.html`.
            var y = this.attr('y');
            if (!y) {
                this.attr('y', '0.8em');
            }

            // An empty text gets rendered into the DOM in webkit-based browsers.
            // In order to unify this behaviour across all browsers
            // we rather hide the text element when it's empty.
            this.attr('display', content ? null : 'none');

            // Preserve spaces. In other words, we do not want consecutive spaces to get collapsed to one.
            this.node.setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:space', 'preserve');

            // Easy way to erase all `<tspan>` children;
            this.node.textContent = '';

            var textNode = this.node;

            if (opt.textPath) {

                // Wrap the text in the SVG <textPath> element that points
                // to a path defined by `opt.textPath` inside the internal `<defs>` element.
                var defs = this.find('defs');
                if (defs.length === 0) {
                    defs = createElement('defs');
                    this.append(defs);
                }

                // If `opt.textPath` is a plain string, consider it to be directly the
                // SVG path data for the text to go along (this is a shortcut).
                // Otherwise if it is an object and contains the `d` property, then this is our path.
                var d = Object(opt.textPath) === opt.textPath ? opt.textPath.d : opt.textPath;
                if (d) {
                    var path = createElement('path', { d: d });
                    defs.append(path);
                }

                var textPath = createElement('textPath');
                // Set attributes on the `<textPath>`. The most important one
                // is the `xlink:href` that points to our newly created `<path/>` element in `<defs/>`.
                // Note that we also allow the following construct:
                // `t.text('my text', { textPath: { 'xlink:href': '#my-other-path' } })`.
                // In other words, one can completely skip the auto-creation of the path
                // and use any other arbitrary path that is in the document.
                if (!opt.textPath['xlink:href'] && path) {
                    textPath.attr('xlink:href', '#' + path.node.id);
                }

                if (Object(opt.textPath) === opt.textPath) {
                    textPath.attr(opt.textPath);
                }
                this.append(textPath);
                // Now all the `<tspan>`s will be inside the `<textPath>`.
                textNode = textPath.node;
            }

            var offset = 0;

            for (var i = 0; i < lines.length; i++) {

                var line = lines[i];
                // Shift all the <tspan> but first by one line (`1em`)
                var lineHeight = opt.lineHeight || '1em';
                if (opt.lineHeight === 'auto') {
                    lineHeight = '1.5em';
                }
                var vLine = V('tspan', { dy: (i == 0 ? '0em' : lineHeight), x: this.attr('x') || 0 });
                vLine.addClass('v-line');

                if (line) {

                    if (opt.annotations) {

                        // Get the line height based on the biggest font size in the annotations for this line.
                        var maxFontSize = 0;

                        // Find the *compacted* annotations for this line.
                        var lineAnnotations = V.annotateString(lines[i], isArray(opt.annotations) ? opt.annotations : [opt.annotations], { offset: -offset, includeAnnotationIndices: opt.includeAnnotationIndices });
                        for (var j = 0; j < lineAnnotations.length; j++) {

                            var annotation = lineAnnotations[j];
                            if (isObject(annotation)) {

                                var fontSize = parseInt(annotation.attrs['font-size'], 10);
                                if (fontSize && fontSize > maxFontSize) {
                                    maxFontSize = fontSize;
                                }

                                tspan = V('tspan', annotation.attrs);
                                if (opt.includeAnnotationIndices) {
                                    // If `opt.includeAnnotationIndices` is `true`,
                                    // set the list of indices of all the applied annotations
                                    // in the `annotations` attribute. This list is a comma
                                    // separated list of indices.
                                    tspan.attr('annotations', annotation.annotations);
                                }
                                if (annotation.attrs['class']) {
                                    tspan.addClass(annotation.attrs['class']);
                                }
                                tspan.node.textContent = annotation.t;

                            } else {

                                tspan = document.createTextNode(annotation || ' ');

                            }
                            vLine.append(tspan);
                        }

                        if (opt.lineHeight === 'auto' && maxFontSize && i !== 0) {

                            vLine.attr('dy', (maxFontSize * 1.2) + 'px');
                        }

                    } else {

                        vLine.node.textContent = line;
                    }

                } else {

                    // Make sure the textContent is never empty. If it is, add an additional
                    // space (an invisible character) so that following lines are correctly
                    // relatively positioned. `dy=1em` won't work with empty lines otherwise.
                    vLine.addClass('v-empty-line');
                    vLine.node.textContent = ' ';
                }

                V(textNode).append(vLine);

                offset += line.length + 1;      // + 1 = newline character.
            }

            return this;
        },

        attr: function(name, value) {

            if (typeof name === 'undefined') {
                // Return all attributes.
                var attributes = this.node.attributes;
                var attrs = {};
                for (var i = 0; i < attributes.length; i++) {
                    attrs[attributes[i].nodeName] = attributes[i].nodeValue;
                }
                return attrs;
            }

            if (typeof name === 'string' && typeof value === 'undefined') {
                return this.node.getAttribute(name);
            }

            if (typeof name === 'object') {

                for (var attrName in name) {
                    if (name.hasOwnProperty(attrName)) {
                        setAttribute(this.node, attrName, name[attrName]);
                    }
                }

            } else {

                setAttribute(this.node, name, value);
            }

            return this;
        },

        remove: function() {
            if (this.node.parentNode) {
                this.node.parentNode.removeChild(this.node);
            }
        },

        append: function(el) {

            var els = el;

            if (Object.prototype.toString.call(el) !== '[object Array]') {

                els = [el];
            }

            for (var i = 0, len = els.length; i < len; i++) {
                el = els[i];
                this.node.appendChild(el instanceof VElement ? el.node : el);
            }

            return this;
        },

        prepend: function(el) {
            this.node.insertBefore(el instanceof VElement ? el.node : el, this.node.firstChild);
        },

        svg: function() {

            return this.node instanceof window.SVGSVGElement ? this : V(this.node.ownerSVGElement);
        },

        defs: function() {

            var defs = this.svg().node.getElementsByTagName('defs');

            return (defs && defs.length) ? V(defs[0]) : undefined;
        },

        clone: function() {
            var clone = V(this.node.cloneNode(true));
            // Note that clone inherits also ID. Therefore, we need to change it here.
            clone.node.id = uniqueId();
            return clone;
        },

        findOne: function(selector) {

            var found = this.node.querySelector(selector);
            return found ? V(found) : undefined;
        },

        find: function(selector) {

            var nodes = this.node.querySelectorAll(selector);

            // Map DOM elements to `VElement`s.
            for (var i = 0, len = nodes.length; i < len; i++) {
                nodes[i] = V(nodes[i]);
            }
            return nodes;
        },

        // Find an index of an element inside its container.
        index: function() {

            var index = 0;
            var node = this.node.previousSibling;

            while (node) {
                // nodeType 1 for ELEMENT_NODE
                if (node.nodeType === 1) index++;
                node = node.previousSibling;
            }

            return index;
        },

        findParentByClass: function(className, terminator) {

            terminator = terminator || this.node.ownerSVGElement;

            var node = this.node.parentNode;

            while (node && node !== terminator) {

                if (V(node).hasClass(className)) {
                    return V(node);
                }

                node = node.parentNode;
            }

            return null;
        },

        // Convert global point into the coordinate space of this element.
        toLocalPoint: function(x, y) {

            var svg = this.svg().node;

            var p = svg.createSVGPoint();
            p.x = x;
            p.y = y;

            try {

                var globalPoint = p.matrixTransform(svg.getScreenCTM().inverse());
                var globalToLocalMatrix = this.node.getTransformToElement(svg).inverse();

            } catch (e) {
                // IE9 throws an exception in odd cases. (`Unexpected call to method or property access`)
                // We have to make do with the original coordianates.
                return p;
            }

            return globalPoint.matrixTransform(globalToLocalMatrix);
        },

        translateCenterToPoint: function(p) {

            var bbox = this.bbox();
            var center = g.rect(bbox).center();

            this.translate(p.x - center.x, p.y - center.y);
        },

        // Efficiently auto-orient an element. This basically implements the orient=auto attribute
        // of markers. The easiest way of understanding on what this does is to imagine the element is an
        // arrowhead. Calling this method on the arrowhead makes it point to the `position` point while
        // being auto-oriented (properly rotated) towards the `reference` point.
        // `target` is the element relative to which the transformations are applied. Usually a viewport.
        translateAndAutoOrient: function(position, reference, target) {

            // Clean-up previously set transformations except the scale. If we didn't clean up the
            // previous transformations then they'd add up with the old ones. Scale is an exception as
            // it doesn't add up, consider: `this.scale(2).scale(2).scale(2)`. The result is that the
            // element is scaled by the factor 2, not 8.

            var s = this.scale();
            this.attr('transform', '');
            this.scale(s.sx, s.sy);

            var svg = this.svg().node;
            var bbox = this.bbox(false, target);

            // 1. Translate to origin.
            var translateToOrigin = svg.createSVGTransform();
            translateToOrigin.setTranslate(-bbox.x - bbox.width / 2, -bbox.y - bbox.height / 2);

            // 2. Rotate around origin.
            var rotateAroundOrigin = svg.createSVGTransform();
            var angle = g.point(position).changeInAngle(position.x - reference.x, position.y - reference.y, reference);
            rotateAroundOrigin.setRotate(angle, 0, 0);

            // 3. Translate to the `position` + the offset (half my width) towards the `reference` point.
            var translateFinal = svg.createSVGTransform();
            var finalPosition = g.point(position).move(reference, bbox.width / 2);
            translateFinal.setTranslate(position.x + (position.x - finalPosition.x), position.y + (position.y - finalPosition.y));

            // 4. Apply transformations.
            var ctm = this.node.getTransformToElement(target);
            var transform = svg.createSVGTransform();
            transform.setMatrix(
                translateFinal.matrix.multiply(
                    rotateAroundOrigin.matrix.multiply(
                        translateToOrigin.matrix.multiply(
                            ctm)))
            );

            // Instead of directly setting the `matrix()` transform on the element, first, decompose
            // the matrix into separate transforms. This allows us to use normal Vectorizer methods
            // as they don't work on matrices. An example of this is to retrieve a scale of an element.
            // this.node.transform.baseVal.initialize(transform);

            var decomposition = decomposeMatrix(transform.matrix);

            this.translate(decomposition.translateX, decomposition.translateY);
            this.rotate(decomposition.rotation);
            // Note that scale has been already applied, hence the following line stays commented. (it's here just for reference).
            //this.scale(decomposition.scaleX, decomposition.scaleY);

            return this;
        },

        animateAlongPath: function(attrs, path) {

            var animateMotion = V('animateMotion', attrs);
            var mpath = V('mpath', { 'xlink:href': '#' + V(path).node.id });

            animateMotion.append(mpath);

            this.append(animateMotion);
            try {
                animateMotion.node.beginElement();
            } catch (e) {
                // Fallback for IE 9.
                // Run the animation programatically if FakeSmile (`http://leunen.me/fakesmile/`) present
                if (document.documentElement.getAttribute('smiling') === 'fake') {

                    // Register the animation. (See `https://answers.launchpad.net/smil/+question/203333`)
                    var animation = animateMotion.node;
                    animation.animators = [];

                    var animationID = animation.getAttribute('id');
                    if (animationID) id2anim[animationID] = animation;

                    var targets = getTargets(animation);
                    for (var i = 0, len = targets.length; i < len; i++) {
                        var target = targets[i];
                        var animator = new Animator(animation, target, i);
                        animators.push(animator);
                        animation.animators[i] = animator;
                        animator.register();
                    }
                }
            }
        },

        hasClass: function(className) {

            return new RegExp('(\\s|^)' + className + '(\\s|$)').test(this.node.getAttribute('class'));
        },

        addClass: function(className) {

            if (!this.hasClass(className)) {
                var prevClasses = this.node.getAttribute('class') || '';
                this.node.setAttribute('class', (prevClasses + ' ' + className).trim());
            }

            return this;
        },

        removeClass: function(className) {

            if (this.hasClass(className)) {
                var newClasses = this.node.getAttribute('class').replace(new RegExp('(\\s|^)' + className + '(\\s|$)', 'g'), '$2');
                this.node.setAttribute('class', newClasses);
            }

            return this;
        },

        toggleClass: function(className, toAdd) {

            var toRemove = typeof toAdd === 'undefined' ? this.hasClass(className) : !toAdd;

            if (toRemove) {
                this.removeClass(className);
            } else {
                this.addClass(className);
            }

            return this;
        },

        // Interpolate path by discrete points. The precision of the sampling
        // is controlled by `interval`. In other words, `sample()` will generate
        // a point on the path starting at the beginning of the path going to the end
        // every `interval` pixels.
        // The sampler can be very useful for e.g. finding intersection between two
        // paths (finding the two closest points from two samples).
        sample: function(interval) {

            interval = interval || 1;
            var node = this.node;
            var length = node.getTotalLength();
            var samples = [];
            var distance = 0;
            var sample;
            while (distance < length) {
                sample = node.getPointAtLength(distance);
                samples.push({ x: sample.x, y: sample.y, distance: distance });
                distance += interval;
            }
            return samples;
        },

        convertToPath: function() {

            var path = createElement('path');
            path.attr(this.attr());
            var d = this.convertToPathData();
            if (d) {
                path.attr('d', d);
            }
            return path;
        },

        convertToPathData: function() {

            var tagName = this.node.tagName.toUpperCase();

            switch (tagName) {
            case 'PATH':
                return this.attr('d');
            case 'LINE':
                return convertLineToPathData(this.node);
            case 'POLYGON':
                return convertPolygonToPathData(this.node);
            case 'POLYLINE':
                return convertPolylineToPathData(this.node);
            case 'ELLIPSE':
                return convertEllipseToPathData(this.node);
            case 'CIRCLE':
                return convertCircleToPathData(this.node);
            case 'RECT':
                return convertRectToPathData(this.node);
            }

            throw new Error(tagName + ' cannot be converted to PATH.');
        },

        // Find the intersection of a line starting in the center
        // of the SVG `node` ending in the point `ref`.
        // `target` is an SVG element to which `node`s transformations are relative to.
        // In JointJS, `target` is the `paper.viewport` SVG group element.
        // Note that `ref` point must be in the coordinate system of the `target` for this function to work properly.
        // Returns a point in the `target` coordinte system (the same system as `ref` is in) if
        // an intersection is found. Returns `undefined` otherwise.
        findIntersection: function(ref, target) {

            var svg = this.svg().node;
            target = target || svg;
            var bbox = g.rect(this.bbox(false, target));
            var center = bbox.center();
            var spot = bbox.intersectionWithLineFromCenterToPoint(ref);

            if (!spot) return undefined;

            var tagName = this.node.localName.toUpperCase();

            // Little speed up optimalization for `<rect>` element. We do not do conversion
            // to path element and sampling but directly calculate the intersection through
            // a transformed geometrical rectangle.
            if (tagName === 'RECT') {

                var gRect = g.rect(
                    parseFloat(this.attr('x') || 0),
                    parseFloat(this.attr('y') || 0),
                    parseFloat(this.attr('width')),
                    parseFloat(this.attr('height'))
                );
                // Get the rect transformation matrix with regards to the SVG document.
                var rectMatrix = this.node.getTransformToElement(target);
                // Decompose the matrix to find the rotation angle.
                var rectMatrixComponents = V.decomposeMatrix(rectMatrix);
                // Now we want to rotate the rectangle back so that we
                // can use `intersectionWithLineFromCenterToPoint()` passing the angle as the second argument.
                var resetRotation = svg.createSVGTransform();
                resetRotation.setRotate(-rectMatrixComponents.rotation, center.x, center.y);
                var rect = V.transformRect(gRect, resetRotation.matrix.multiply(rectMatrix));
                spot = g.rect(rect).intersectionWithLineFromCenterToPoint(ref, rectMatrixComponents.rotation);

            } else if (tagName === 'PATH' || tagName === 'POLYGON' || tagName === 'POLYLINE' || tagName === 'CIRCLE' || tagName === 'ELLIPSE') {

                var pathNode = (tagName === 'PATH') ? this : this.convertToPath();
                var samples = pathNode.sample();
                var minDistance = Infinity;
                var closestSamples = [];

                for (var i = 0, len = samples.length; i < len; i++) {

                    var sample = samples[i];
                    // Convert the sample point in the local coordinate system to the global coordinate system.
                    var gp = V.createSVGPoint(sample.x, sample.y);
                    gp = gp.matrixTransform(this.node.getTransformToElement(target));
                    sample = g.point(gp);
                    var centerDistance = sample.distance(center);
                    // Penalize a higher distance to the reference point by 10%.
                    // This gives better results. This is due to
                    // inaccuracies introduced by rounding errors and getPointAtLength() returns.
                    var refDistance = sample.distance(ref) * 1.1;
                    var distance = centerDistance + refDistance;
                    if (distance < minDistance) {
                        minDistance = distance;
                        closestSamples = [{ sample: sample, refDistance: refDistance }];
                    } else if (distance < minDistance + 1) {
                        closestSamples.push({ sample: sample, refDistance: refDistance });
                    }
                }
                closestSamples.sort(function(a, b) { return a.refDistance - b.refDistance; });
                spot = closestSamples[0].sample;
            }

            return spot;
        }
    };

    function convertLineToPathData(line) {

        line = createElement(line);
        var d = [
            'M', line.attr('x1'), line.attr('y1'),
            'L', line.attr('x2'), line.attr('y2')
        ].join(' ');
        return d;
    }

    function convertPolygonToPathData(polygon) {

        polygon = createElement(polygon);
        var points = polygon.node.points;

        var d = [];
        var p;
        for (var i = 0; i < points.length; i++) {
            p = points[i];
            d.push(i === 0 ? 'M' : 'L', p.x, p.y);
        }
        d.push('Z');
        return d.join(' ');
    }

    function convertPolylineToPathData(polyline) {

        polyline = createElement(polyline);
        var points = polyline.node.points;

        var d = [];
        var p;
        for (var i = 0; i < points.length; i++) {
            p = points[i];
            d.push(i === 0 ? 'M' : 'L', p.x, p.y);
        }
        return d.join(' ');
    }

    var KAPPA = 0.5522847498307935;

    function convertCircleToPathData(circle) {

        circle = createElement(circle);
        var cx = parseFloat(circle.attr('cx')) || 0;
        var cy = parseFloat(circle.attr('cy')) || 0;
        var r = parseFloat(circle.attr('r'));
        var cd = r * KAPPA; // Control distance.

        var d = [
            'M', cx, cy - r,    // Move to the first point.
            'C', cx + cd, cy - r, cx + r, cy - cd, cx + r, cy, // I. Quadrant.
            'C', cx + r, cy + cd, cx + cd, cy + r, cx, cy + r, // II. Quadrant.
            'C', cx - cd, cy + r, cx - r, cy + cd, cx - r, cy, // III. Quadrant.
            'C', cx - r, cy - cd, cx - cd, cy - r, cx, cy - r, // IV. Quadrant.
            'Z'
        ].join(' ');
        return d;
    }

    function convertEllipseToPathData(ellipse) {

        ellipse = createElement(ellipse);
        var cx = parseFloat(ellipse.attr('cx')) || 0;
        var cy = parseFloat(ellipse.attr('cy')) || 0;
        var rx = parseFloat(ellipse.attr('rx'));
        var ry = parseFloat(ellipse.attr('ry')) || rx;
        var cdx = rx * KAPPA; // Control distance x.
        var cdy = ry * KAPPA; // Control distance y.

        var d = [
            'M', cx, cy - ry,    // Move to the first point.
            'C', cx + cdx, cy - ry, cx + rx, cy - cdy, cx + rx, cy, // I. Quadrant.
            'C', cx + rx, cy + cdy, cx + cdx, cy + ry, cx, cy + ry, // II. Quadrant.
            'C', cx - cdx, cy + ry, cx - rx, cy + cdy, cx - rx, cy, // III. Quadrant.
            'C', cx - rx, cy - cdy, cx - cdx, cy - ry, cx, cy - ry, // IV. Quadrant.
            'Z'
        ].join(' ');
        return d;
    }

    function convertRectToPathData(rect) {

        rect = createElement(rect);
        var x = parseFloat(rect.attr('x')) || 0;
        var y = parseFloat(rect.attr('y')) || 0;
        var width = parseFloat(rect.attr('width')) || 0;
        var height = parseFloat(rect.attr('height')) || 0;
        var rx = parseFloat(rect.attr('rx')) || 0;
        var ry = parseFloat(rect.attr('ry')) || 0;
        var bbox = g.rect(x, y, width, height);

        var d;

        if (!rx && !ry) {

            d = [
                'M', bbox.origin().x, bbox.origin().y,
                'H', bbox.corner().x,
                'V', bbox.corner().y,
                'H', bbox.origin().x,
                'V', bbox.origin().y,
                'Z'
            ].join(' ');

        } else {

            var r = x + width;
            var b = y + height;
            d = [
                'M', x + rx, y,
                'L', r - rx, y,
                'Q', r, y, r, y + ry,
                'L', r, y + height - ry,
                'Q', r, b, r - rx, b,
                'L', x + rx, b,
                'Q', x, b, x, b - rx,
                'L', x, y + ry,
                'Q', x, y, x + rx, y,
                'Z'
            ].join(' ');
        }
        return d;
    }

    // Convert a rectangle to SVG path commands. `r` is an object of the form:
    // `{ x: [number], y: [number], width: [number], height: [number], top-ry: [number], top-ry: [number], bottom-rx: [number], bottom-ry: [number] }`,
    // where `x, y, width, height` are the usual rectangle attributes and [top-/bottom-]rx/ry allows for
    // specifying radius of the rectangle for all its sides (as opposed to the built-in SVG rectangle
    // that has only `rx` and `ry` attributes).
    function rectToPath(r) {

        var topRx = r.rx || r['top-rx'] || 0;
        var bottomRx = r.rx || r['bottom-rx'] || 0;
        var topRy = r.ry || r['top-ry'] || 0;
        var bottomRy = r.ry || r['bottom-ry'] || 0;

        return [
            'M', r.x, r.y + topRy,
            'v', r.height - topRy - bottomRy,
            'a', bottomRx, bottomRy, 0, 0, 0, bottomRx, bottomRy,
            'h', r.width - 2 * bottomRx,
            'a', bottomRx, bottomRy, 0, 0, 0, bottomRx, -bottomRy,
            'v', -(r.height - bottomRy - topRy),
            'a', topRx, topRy, 0, 0, 0, -topRx, -topRy,
            'h', -(r.width - 2 * topRx),
            'a', topRx, topRy, 0, 0, 0, -topRx, topRy
        ].join(' ');
    }

    var V = createElement;

    V.isVElement = function(object) {
        return object instanceof VElement;
    };

    V.decomposeMatrix = decomposeMatrix;
    V.rectToPath = rectToPath;

    var svgDocument = V('svg').node;

    V.createSVGMatrix = function(m) {

        var svgMatrix = svgDocument.createSVGMatrix();
        for (var component in m) {
            svgMatrix[component] = m[component];
        }

        return svgMatrix;
    };

    V.createSVGTransform = function() {

        return svgDocument.createSVGTransform();
    };

    V.createSVGPoint = function(x, y) {

        var p = svgDocument.createSVGPoint();
        p.x = x;
        p.y = y;
        return p;
    };

    V.transformRect = function(r, matrix) {

        var p = svgDocument.createSVGPoint();

        p.x = r.x;
        p.y = r.y;
        var corner1 = p.matrixTransform(matrix);

        p.x = r.x + r.width;
        p.y = r.y;
        var corner2 = p.matrixTransform(matrix);

        p.x = r.x + r.width;
        p.y = r.y + r.height;
        var corner3 = p.matrixTransform(matrix);

        p.x = r.x;
        p.y = r.y + r.height;
        var corner4 = p.matrixTransform(matrix);

        var minX = Math.min(corner1.x, corner2.x, corner3.x, corner4.x);
        var maxX = Math.max(corner1.x, corner2.x, corner3.x, corner4.x);
        var minY = Math.min(corner1.y, corner2.y, corner3.y, corner4.y);
        var maxY = Math.max(corner1.y, corner2.y, corner3.y, corner4.y);

        return { x: minX, y: minY, width: maxX - minX, height: maxY - minY };
    };

    // Convert a style represented as string (e.g. `'fill="blue"; stroke="red"'`) to
    // an object (`{ fill: 'blue', stroke: 'red' }`).
    V.styleToObject = function(styleString) {
        var ret = {};
        var styles = styleString.split(';');
        for (var i = 0; i < styles.length; i++) {
            var style = styles[i];
            var pair = style.split('=');
            ret[pair[0].trim()] = pair[1].trim();
        }
        return ret;
    };

    // Inspired by d3.js https://github.com/mbostock/d3/blob/master/src/svg/arc.js
    V.createSlicePathData = function(innerRadius, outerRadius, startAngle, endAngle) {

        var svgArcMax = 2 * Math.PI - 1e-6;
        var r0 = innerRadius;
        var r1 = outerRadius;
        var a0 = startAngle;
        var a1 = endAngle;
        var da = (a1 < a0 && (da = a0, a0 = a1, a1 = da), a1 - a0);
        var df = da < Math.PI ? '0' : '1';
        var c0 = Math.cos(a0);
        var s0 = Math.sin(a0);
        var c1 = Math.cos(a1);
        var s1 = Math.sin(a1);

        return (da >= svgArcMax)
            ? (r0
               ? 'M0,' + r1
               + 'A' + r1 + ',' + r1 + ' 0 1,1 0,' + (-r1)
               + 'A' + r1 + ',' + r1 + ' 0 1,1 0,' + r1
               + 'M0,' + r0
               + 'A' + r0 + ',' + r0 + ' 0 1,0 0,' + (-r0)
               + 'A' + r0 + ',' + r0 + ' 0 1,0 0,' + r0
               + 'Z'
               : 'M0,' + r1
               + 'A' + r1 + ',' + r1 + ' 0 1,1 0,' + (-r1)
               + 'A' + r1 + ',' + r1 + ' 0 1,1 0,' + r1
               + 'Z')
            : (r0
               ? 'M' + r1 * c0 + ',' + r1 * s0
               + 'A' + r1 + ',' + r1 + ' 0 ' + df + ',1 ' + r1 * c1 + ',' + r1 * s1
               + 'L' + r0 * c1 + ',' + r0 * s1
               + 'A' + r0 + ',' + r0 + ' 0 ' + df + ',0 ' + r0 * c0 + ',' + r0 * s0
               + 'Z'
               : 'M' + r1 * c0 + ',' + r1 * s0
               + 'A' + r1 + ',' + r1 + ' 0 ' + df + ',1 ' + r1 * c1 + ',' + r1 * s1
               + 'L0,0'
               + 'Z');
    };

    // Merge attributes from object `b` with attributes in object `a`.
    // Note that this modifies the object `a`.
    // Also important to note that attributes are merged but CSS classes are concatenated.
    V.mergeAttrs = function(a, b) {
        for (var attr in b) {
            if (attr === 'class') {
                // Concatenate classes.
                a[attr] = a[attr] ? a[attr] + ' ' + b[attr] : b[attr];
            } else if (attr === 'style') {
                // `style` attribute can be an object.
                if (isObject(a[attr]) && isObject(b[attr])) {
                    // `style` stored in `a` is an object.
                    a[attr] = V.mergeAttrs(a[attr], b[attr]);
                } else if (isObject(a[attr])) {
                    // `style` in `a` is an object but it's a string in `b`.
                    // Convert the style represented as a string to an object in `b`.
                    a[attr] = V.mergeAttrs(a[attr], V.styleToObject(b[attr]));
                } else if (isObject(b[attr])) {
                    // `style` in `a` is a string, in `b` it's an object.
                    a[attr] = V.mergeAttrs(V.styleToObject(a[attr]), b[attr]);
                } else {
                    // Both styles are strings.
                    a[attr] = V.mergeAttrs(V.styleToObject(a[attr]), V.styleToObject(b[attr]));
                }
            } else {
                a[attr] = b[attr];
            }
        }
        return a;
    };

    V.annotateString = function(t, annotations, opt) {

        annotations = annotations || [];
        opt = opt || {};
        offset = opt.offset || 0;
        var compacted = [];
        var batch;

        var ret = [];
        var item;
        var prev;

        for (var i = 0; i < t.length; i++) {

            item = ret[i] = t[i];

            for (var j = 0; j < annotations.length; j++) {
                var annotation = annotations[j];
                var start = annotation.start + offset;
                var end = annotation.end + offset;

                if (i >= start && i < end) {
                    // Annotation applies.
                    if (isObject(item)) {
                        // There is more than one annotation to be applied => Merge attributes.
                        item.attrs = V.mergeAttrs(V.mergeAttrs({}, item.attrs), annotation.attrs);
                    } else {
                        item = ret[i] = { t: t[i], attrs: annotation.attrs };
                    }
                    if (opt.includeAnnotationIndices) {
                        (item.annotations || (item.annotations = [])).push(j);
                    }
                }
            }

            prev = ret[i - 1];

            if (!prev) {

                batch = item;

            } else if (isObject(item) && isObject(prev)) {
                // Both previous item and the current one are annotations. If the attributes
                // didn't change, merge the text.
                if (JSON.stringify(item.attrs) === JSON.stringify(prev.attrs)) {
                    batch.t += item.t;
                } else {
                    compacted.push(batch);
                    batch = item;
                }

            } else if (isObject(item)) {
                // Previous item was a string, current item is an annotation.
                compacted.push(batch);
                batch = item;

            } else if (isObject(prev)) {
                // Previous item was an annotation, current item is a string.
                compacted.push(batch);
                batch = item;

            } else {
                // Both previous and current item are strings.
                batch = (batch || '') + item;
            }
        }

        if (batch) {
            compacted.push(batch);
        }

        return compacted;
    };

    V.findAnnotationsAtIndex = function(annotations, index) {

        if (!annotations) return [];

        var found = [];

        annotations.forEach(function(annotation) {

            if (annotation.start < index && index <= annotation.end) {
                found.push(annotation);
            }
        });
        return found;
    };

    V.findAnnotationsBetweenIndexes = function(annotations, start, end) {

        if (!annotations) return [];

        var found = [];

        annotations.forEach(function(annotation) {

            if ((start >= annotation.start && start < annotation.end) || (end > annotation.start && end <= annotation.end) || (annotation.start >= start && annotation.end < end)) {
                found.push(annotation);
            }
        });
        return found;
    };

    // Shift all the textg annotations after character `index` by `offset` positions.
    V.shiftAnnotations = function(annotations, index, offset) {

        if (!annotations) return annotations;

        annotations.forEach(function(annotation) {

            if (annotation.start >= index) {
                annotation.start += offset;
                annotation.end += offset;
            }
        });

        return annotations;
    };

    return V;
}));

//      Geometry library.
//      (c) 2011-2013 client IO

(function(root, factory) {

    if (typeof define === 'function' && define.amd) {

        // AMD. Register as an anonymous module.
        define([], factory);

    } else if (typeof exports === 'object') {

        // Node. Does not work with strict CommonJS, but
        // only CommonJS-like environments that support module.exports,
        // like Node.
        module.exports = factory();

    } else {

        // Browser globals.
        root.g = factory();

    }

}(this, function() {

    // Declare shorthands to the most used math functions.
    var math = Math;
    var abs = math.abs;
    var cos = math.cos;
    var sin = math.sin;
    var sqrt = math.sqrt;
    var mmin = math.min;
    var mmax = math.max;
    var atan = math.atan;
    var atan2 = math.atan2;
    var acos = math.acos;
    var round = math.round;
    var floor = math.floor;
    var PI = math.PI;
    var random = math.random;
    var toDeg = function(rad) { return (180 * rad / PI) % 360; };
    var toRad = function(deg, over360) {
        over360 = over360 || false;
        deg = over360 ? deg : (deg % 360);
        return deg * PI / 180;
    };
    var snapToGrid = function(val, gridSize) { return gridSize * Math.round(val / gridSize); };
    var normalizeAngle = function(angle) { return (angle % 360) + (angle < 0 ? 360 : 0); };

    // Point
    // -----

    // Point is the most basic object consisting of x/y coordinate,.

    // Possible instantiations are:

    // * `point(10, 20)`
    // * `new point(10, 20)`
    // * `point('10 20')`
    // * `point(point(10, 20))`
    function point(x, y) {
        if (!(this instanceof point))
            return new point(x, y);
        var xy;
        if (y === undefined && Object(x) !== x) {
            xy = x.split(x.indexOf('@') === -1 ? ' ' : '@');
            this.x = parseInt(xy[0], 10);
            this.y = parseInt(xy[1], 10);
        } else if (Object(x) === x) {
            this.x = x.x;
            this.y = x.y;
        } else {
            this.x = x;
            this.y = y;
        }
    }

    point.prototype = {
        toString: function() {
            return this.x + '@' + this.y;
        },
        // If point lies outside rectangle `r`, return the nearest point on the boundary of rect `r`,
        // otherwise return point itself.
        // (see Squeak Smalltalk, Point>>adhereTo:)
        adhereToRect: function(r) {
            if (r.containsPoint(this)) {
                return this;
            }
            this.x = mmin(mmax(this.x, r.x), r.x + r.width);
            this.y = mmin(mmax(this.y, r.y), r.y + r.height);
            return this;
        },
        // Compute the angle between me and `p` and the x axis.
        // (cartesian-to-polar coordinates conversion)
        // Return theta angle in degrees.
        theta: function(p) {
            p = point(p);
            // Invert the y-axis.
            var y = -(p.y - this.y);
            var x = p.x - this.x;
            // Makes sure that the comparison with zero takes rounding errors into account.
            var PRECISION = 10;
            // Note that `atan2` is not defined for `x`, `y` both equal zero.
            var rad = (y.toFixed(PRECISION) == 0 && x.toFixed(PRECISION) == 0) ? 0 : atan2(y, x);

            // Correction for III. and IV. quadrant.
            if (rad < 0) {
                rad = 2 * PI + rad;
            }
            return 180 * rad / PI;
        },
        // Returns distance between me and point `p`.
        distance: function(p) {
            return line(this, p).length();
        },
        // Returns a manhattan (taxi-cab) distance between me and point `p`.
        manhattanDistance: function(p) {
            return abs(p.x - this.x) + abs(p.y - this.y);
        },
        // Offset me by the specified amount.
        offset: function(dx, dy) {
            this.x += dx || 0;
            this.y += dy || 0;
            return this;
        },
        magnitude: function() {
            return sqrt((this.x * this.x) + (this.y * this.y)) || 0.01;
        },
        update: function(x, y) {
            this.x = x || 0;
            this.y = y || 0;
            return this;
        },
        round: function(decimals) {
            this.x = decimals ? this.x.toFixed(decimals) : round(this.x);
            this.y = decimals ? this.y.toFixed(decimals) : round(this.y);
            return this;
        },
        // Scale the line segment between (0,0) and me to have a length of len.
        normalize: function(len) {
            var s = (len || 1) / this.magnitude();
            this.x = s * this.x;
            this.y = s * this.y;
            return this;
        },
        difference: function(p) {
            return point(this.x - p.x, this.y - p.y);
        },
        // Return the bearing between me and point `p`.
        bearing: function(p) {
            return line(this, p).bearing();
        },
        // Converts rectangular to polar coordinates.
        // An origin can be specified, otherwise it's 0@0.
        toPolar: function(o) {
            o = (o && point(o)) || point(0, 0);
            var x = this.x;
            var y = this.y;
            this.x = sqrt((x - o.x) * (x - o.x) + (y - o.y) * (y - o.y)); // r
            this.y = toRad(o.theta(point(x, y)));
            return this;
        },
        // Rotate point by angle around origin o.
        rotate: function(o, angle) {
            angle = (angle + 360) % 360;
            this.toPolar(o);
            this.y += toRad(angle);
            var p = point.fromPolar(this.x, this.y, o);
            this.x = p.x;
            this.y = p.y;
            return this;
        },
        // Move point on line starting from ref ending at me by
        // distance distance.
        move: function(ref, distance) {
            var theta = toRad(point(ref).theta(this));
            return this.offset(cos(theta) * distance, -sin(theta) * distance);
        },
        // Returns change in angle from my previous position (-dx, -dy) to my new position
        // relative to ref point.
        changeInAngle: function(dx, dy, ref) {
            // Revert the translation and measure the change in angle around x-axis.
            return point(this).offset(-dx, -dy).theta(ref) - this.theta(ref);
        },
        equals: function(p) {
            return this.x === p.x && this.y === p.y;
        },
        snapToGrid: function(gx, gy) {
            this.x = snapToGrid(this.x, gx);
            this.y = snapToGrid(this.y, gy || gx);
            return this;
        },
        // Returns a point that is the reflection of me with
        // the center of inversion in ref point.
        reflection: function(ref) {
            return point(ref).move(this, this.distance(ref));
        }
    };
    // Alternative constructor, from polar coordinates.
    // @param {number} r Distance.
    // @param {number} angle Angle in radians.
    // @param {point} [optional] o Origin.
    point.fromPolar = function(r, angle, o) {
        o = (o && point(o)) || point(0, 0);
        var x = abs(r * cos(angle));
        var y = abs(r * sin(angle));
        var deg = normalizeAngle(toDeg(angle));

        if (deg < 90) {
            y = -y;
        } else if (deg < 180) {
            x = -x;
            y = -y;
        } else if (deg < 270) {
            x = -x;
        }

        return point(o.x + x, o.y + y);
    };

    // Create a point with random coordinates that fall into the range `[x1, x2]` and `[y1, y2]`.
    point.random = function(x1, x2, y1, y2) {
        return point(floor(random() * (x2 - x1 + 1) + x1), floor(random() * (y2 - y1 + 1) + y1));
    };

    // Line.
    // -----
    function line(p1, p2) {
        if (!(this instanceof line))
            return new line(p1, p2);
        this.start = point(p1);
        this.end = point(p2);
    }

    line.prototype = {
        toString: function() {
            return this.start.toString() + ' ' + this.end.toString();
        },
        // @return {double} length of the line
        length: function() {
            return sqrt(this.squaredLength());
        },
        // @return {integer} length without sqrt
        // @note for applications where the exact length is not necessary (e.g. compare only)
        squaredLength: function() {
            var x0 = this.start.x;
            var y0 = this.start.y;
            var x1 = this.end.x;
            var y1 = this.end.y;
            return (x0 -= x1) * x0 + (y0 -= y1) * y0;
        },
        // @return {point} my midpoint
        midpoint: function() {
            return point((this.start.x + this.end.x) / 2,
                         (this.start.y + this.end.y) / 2);
        },
        // @return {point} Point where I'm intersecting l.
        // @see Squeak Smalltalk, LineSegment>>intersectionWith:
        intersection: function(l) {
            var pt1Dir = point(this.end.x - this.start.x, this.end.y - this.start.y);
            var pt2Dir = point(l.end.x - l.start.x, l.end.y - l.start.y);
            var det = (pt1Dir.x * pt2Dir.y) - (pt1Dir.y * pt2Dir.x);
            var deltaPt = point(l.start.x - this.start.x, l.start.y - this.start.y);
            var alpha = (deltaPt.x * pt2Dir.y) - (deltaPt.y * pt2Dir.x);
            var beta = (deltaPt.x * pt1Dir.y) - (deltaPt.y * pt1Dir.x);

            if (det === 0 ||
                alpha * det < 0 ||
                beta * det < 0) {
                // No intersection found.
                return null;
            }
            if (det > 0) {
                if (alpha > det || beta > det) {
                    return null;
                }
            } else {
                if (alpha < det || beta < det) {
                    return null;
                }
            }
            return point(this.start.x + (alpha * pt1Dir.x / det),
                         this.start.y + (alpha * pt1Dir.y / det));
        },

        // @return the bearing (cardinal direction) of the line. For example N, W, or SE.
        // @returns {String} One of the following bearings : NE, E, SE, S, SW, W, NW, N.
        bearing: function() {

            var lat1 = toRad(this.start.y);
            var lat2 = toRad(this.end.y);
            var lon1 = this.start.x;
            var lon2 = this.end.x;
            var dLon = toRad(lon2 - lon1);
            var y = sin(dLon) * cos(lat2);
            var x = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(dLon);
            var brng = toDeg(atan2(y, x));

            var bearings = ['NE', 'E', 'SE', 'S', 'SW', 'W', 'NW', 'N'];

            var index = brng - 22.5;
            if (index < 0)
                index += 360;
            index = parseInt(index / 45);

            return bearings[index];
        },

        // @return {point} my point at 't' <0,1>
        pointAt: function(t) {
            var x = (1 - t) * this.start.x + t * this.end.x;
            var y = (1 - t) * this.start.y + t * this.end.y;
            return point(x, y);
        },

        // @return {number} the offset of the point `p` from the line. + if the point `p` is on the right side of the line, - if on the left and 0 if on the line.
        pointOffset: function(p) {
            // Find the sign of the determinant of vectors (start,end), where p is the query point.
            return ((this.end.x - this.start.x) * (p.y - this.start.y) - (this.end.y - this.start.y) * (p.x - this.start.x)) / 2;
        }
    };

    // Rectangle.
    // ----------
    function rect(x, y, w, h) {
        if (!(this instanceof rect))
            return new rect(x, y, w, h);
        if (y === undefined) {
            y = x.y;
            w = x.width;
            h = x.height;
            x = x.x;
        }
        this.x = x;
        this.y = y;
        this.width = w;
        this.height = h;
    }

    rect.prototype = {
        toString: function() {
            return this.origin().toString() + ' ' + this.corner().toString();
        },
        origin: function() {
            return point(this.x, this.y);
        },
        corner: function() {
            return point(this.x + this.width, this.y + this.height);
        },
        topRight: function() {
            return point(this.x + this.width, this.y);
        },
        bottomLeft: function() {
            return point(this.x, this.y + this.height);
        },
        center: function() {
            return point(this.x + this.width / 2, this.y + this.height / 2);
        },
        // @return {boolean} true if rectangles intersect
        intersect: function(r) {
            var myOrigin = this.origin();
            var myCorner = this.corner();
            var rOrigin = r.origin();
            var rCorner = r.corner();

            if (rCorner.x <= myOrigin.x ||
                rCorner.y <= myOrigin.y ||
                rOrigin.x >= myCorner.x ||
                rOrigin.y >= myCorner.y) return false;
            return true;
        },
        // @return {string} (left|right|top|bottom) side which is nearest to point
        // @see Squeak Smalltalk, Rectangle>>sideNearestTo:
        sideNearestToPoint: function(p) {
            p = point(p);
            var distToLeft = p.x - this.x;
            var distToRight = (this.x + this.width) - p.x;
            var distToTop = p.y - this.y;
            var distToBottom = (this.y + this.height) - p.y;
            var closest = distToLeft;
            var side = 'left';

            if (distToRight < closest) {
                closest = distToRight;
                side = 'right';
            }
            if (distToTop < closest) {
                closest = distToTop;
                side = 'top';
            }
            if (distToBottom < closest) {
                closest = distToBottom;
                side = 'bottom';
            }
            return side;
        },
        // @return {bool} true if point p is insight me
        containsPoint: function(p) {
            p = point(p);
            if (p.x >= this.x && p.x <= this.x + this.width &&
                p.y >= this.y && p.y <= this.y + this.height) {
                return true;
            }
            return false;
        },
        // Algorithm ported from java.awt.Rectangle from OpenJDK.
        // @return {bool} true if rectangle `r` is inside me.
        containsRect: function(r) {
            var nr = rect(r).normalize();
            var W = nr.width;
            var H = nr.height;
            var X = nr.x;
            var Y = nr.y;
            var w = this.width;
            var h = this.height;
            if ((w | h | W | H) < 0) {
                // At least one of the dimensions is negative...
                return false;
            }
            // Note: if any dimension is zero, tests below must return false...
            var x = this.x;
            var y = this.y;
            if (X < x || Y < y) {
                return false;
            }
            w += x;
            W += X;
            if (W <= X) {
                // X+W overflowed or W was zero, return false if...
                // either original w or W was zero or
                // x+w did not overflow or
                // the overflowed x+w is smaller than the overflowed X+W
                if (w >= x || W > w) return false;
            } else {
                // X+W did not overflow and W was not zero, return false if...
                // original w was zero or
                // x+w did not overflow and x+w is smaller than X+W
                if (w >= x && W > w) return false;
            }
            h += y;
            H += Y;
            if (H <= Y) {
                if (h >= y || H > h) return false;
            } else {
                if (h >= y && H > h) return false;
            }
            return true;
        },
        // @return {point} a point on my boundary nearest to p
        // @see Squeak Smalltalk, Rectangle>>pointNearestTo:
        pointNearestToPoint: function(p) {
            p = point(p);
            if (this.containsPoint(p)) {
                var side = this.sideNearestToPoint(p);
                switch (side){
                    case 'right': return point(this.x + this.width, p.y);
                    case 'left': return point(this.x, p.y);
                    case 'bottom': return point(p.x, this.y + this.height);
                    case 'top': return point(p.x, this.y);
                }
            }
            return p.adhereToRect(this);
        },
        // Find point on my boundary where line starting
        // from my center ending in point p intersects me.
        // @param {number} angle If angle is specified, intersection with rotated rectangle is computed.
        intersectionWithLineFromCenterToPoint: function(p, angle) {
            p = point(p);
            var center = point(this.x + this.width / 2, this.y + this.height / 2);
            var result;
            if (angle) p.rotate(center, angle);

            // (clockwise, starting from the top side)
            var sides = [
                line(this.origin(), this.topRight()),
                line(this.topRight(), this.corner()),
                line(this.corner(), this.bottomLeft()),
                line(this.bottomLeft(), this.origin())
            ];
            var connector = line(center, p);

            for (var i = sides.length - 1; i >= 0; --i) {
                var intersection = sides[i].intersection(connector);
                if (intersection !== null) {
                    result = intersection;
                    break;
                }
            }
            if (result && angle) result.rotate(center, -angle);
            return result;
        },
        // Move and expand me.
        // @param r {rectangle} representing deltas
        moveAndExpand: function(r) {
            this.x += r.x || 0;
            this.y += r.y || 0;
            this.width += r.width || 0;
            this.height += r.height || 0;
            return this;
        },
        round: function(decimals) {
            this.x = decimals ? this.x.toFixed(decimals) : round(this.x);
            this.y = decimals ? this.y.toFixed(decimals) : round(this.y);
            this.width = decimals ? this.width.toFixed(decimals) : round(this.width);
            this.height = decimals ? this.height.toFixed(decimals) : round(this.height);
            return this;
        },
        // Normalize the rectangle; i.e., make it so that it has a non-negative width and height.
        // If width < 0 the function swaps the left and right corners,
        // and it swaps the top and bottom corners if height < 0
        // like in http://qt-project.org/doc/qt-4.8/qrectf.html#normalized
        normalize: function() {
            var newx = this.x;
            var newy = this.y;
            var newwidth = this.width;
            var newheight = this.height;
            if (this.width < 0) {
                newx = this.x + this.width;
                newwidth = -this.width;
            }
            if (this.height < 0) {
                newy = this.y + this.height;
                newheight = -this.height;
            }
            this.x = newx;
            this.y = newy;
            this.width = newwidth;
            this.height = newheight;
            return this;
        },
        // Find my bounding box when I'm rotated with the center of rotation in the center of me.
        // @return r {rectangle} representing a bounding box
        bbox: function(angle) {
            var theta = toRad(angle || 0);
            var st = abs(sin(theta));
            var ct = abs(cos(theta));
            var w = this.width * ct + this.height * st;
            var h = this.width * st + this.height * ct;
            return rect(this.x + (this.width - w) / 2, this.y + (this.height - h) / 2, w, h);
        }
    };

    // Ellipse.
    // --------
    function ellipse(c, a, b) {
        if (!(this instanceof ellipse))
            return new ellipse(c, a, b);
        c = point(c);
        this.x = c.x;
        this.y = c.y;
        this.a = a;
        this.b = b;
    }

    ellipse.prototype = {
        toString: function() {
            return point(this.x, this.y).toString() + ' ' + this.a + ' ' + this.b;
        },
        bbox: function() {
            return rect(this.x - this.a, this.y - this.b, 2 * this.a, 2 * this.b);
        },
        // Find point on me where line from my center to
        // point p intersects my boundary.
        // @param {number} angle If angle is specified, intersection with rotated ellipse is computed.
        intersectionWithLineFromCenterToPoint: function(p, angle) {
            p = point(p);
            if (angle) p.rotate(point(this.x, this.y), angle);
            var dx = p.x - this.x;
            var dy = p.y - this.y;
            var result;
            if (dx === 0) {
                result = this.bbox().pointNearestToPoint(p);
                if (angle) return result.rotate(point(this.x, this.y), -angle);
                return result;
            }
            var m = dy / dx;
            var mSquared = m * m;
            var aSquared = this.a * this.a;
            var bSquared = this.b * this.b;
            var x = sqrt(1 / ((1 / aSquared) + (mSquared / bSquared)));

            x = dx < 0 ? -x : x;
            var y = m * x;
            result = point(this.x + x, this.y + y);
            if (angle) return result.rotate(point(this.x, this.y), -angle);
            return result;
        }
    };

    // Bezier curve.
    // -------------
    var bezier = {
        // Cubic Bezier curve path through points.
        // Ported from C# implementation by Oleg V. Polikarpotchkin and Peter Lee (http://www.codeproject.com/KB/graphics/BezierSpline.aspx).
        // @param {array} points Array of points through which the smooth line will go.
        // @return {array} SVG Path commands as an array
        curveThroughPoints: function(points) {
            var controlPoints = this.getCurveControlPoints(points);
            var path = ['M', points[0].x, points[0].y];

            for (var i = 0; i < controlPoints[0].length; i++) {
                path.push('C', controlPoints[0][i].x, controlPoints[0][i].y, controlPoints[1][i].x, controlPoints[1][i].y, points[i + 1].x, points[i + 1].y);
            }
            return path;
        },

        // Get open-ended Bezier Spline Control Points.
        // @param knots Input Knot Bezier spline points (At least two points!).
        // @param firstControlPoints Output First Control points. Array of knots.length - 1 length.
        //  @param secondControlPoints Output Second Control points. Array of knots.length - 1 length.
        getCurveControlPoints: function(knots) {
            var firstControlPoints = [];
            var secondControlPoints = [];
            var n = knots.length - 1;
            var i;

            // Special case: Bezier curve should be a straight line.
            if (n == 1) {
                // 3P1 = 2P0 + P3
                firstControlPoints[0] = point((2 * knots[0].x + knots[1].x) / 3,
                                              (2 * knots[0].y + knots[1].y) / 3);
                // P2 = 2P1 – P0
                secondControlPoints[0] = point(2 * firstControlPoints[0].x - knots[0].x,
                                               2 * firstControlPoints[0].y - knots[0].y);
                return [firstControlPoints, secondControlPoints];
            }

            // Calculate first Bezier control points.
            // Right hand side vector.
            var rhs = [];

            // Set right hand side X values.
            for (i = 1; i < n - 1; i++) {
                rhs[i] = 4 * knots[i].x + 2 * knots[i + 1].x;
            }
            rhs[0] = knots[0].x + 2 * knots[1].x;
            rhs[n - 1] = (8 * knots[n - 1].x + knots[n].x) / 2.0;
            // Get first control points X-values.
            var x = this.getFirstControlPoints(rhs);

            // Set right hand side Y values.
            for (i = 1; i < n - 1; ++i) {
                rhs[i] = 4 * knots[i].y + 2 * knots[i + 1].y;
            }
            rhs[0] = knots[0].y + 2 * knots[1].y;
            rhs[n - 1] = (8 * knots[n - 1].y + knots[n].y) / 2.0;
            // Get first control points Y-values.
            var y = this.getFirstControlPoints(rhs);

            // Fill output arrays.
            for (i = 0; i < n; i++) {
                // First control point.
                firstControlPoints.push(point(x[i], y[i]));
                // Second control point.
                if (i < n - 1) {
                    secondControlPoints.push(point(2 * knots [i + 1].x - x[i + 1],
                                                   2 * knots[i + 1].y - y[i + 1]));
                } else {
                    secondControlPoints.push(point((knots[n].x + x[n - 1]) / 2,
                                                   (knots[n].y + y[n - 1]) / 2));
                }
            }
            return [firstControlPoints, secondControlPoints];
        },

        // Solves a tridiagonal system for one of coordinates (x or y) of first Bezier control points.
        // @param rhs Right hand side vector.
        // @return Solution vector.
        getFirstControlPoints: function(rhs) {
            var n = rhs.length;
            // `x` is a solution vector.
            var x = [];
            var tmp = [];
            var b = 2.0;

            x[0] = rhs[0] / b;
            // Decomposition and forward substitution.
            for (var i = 1; i < n; i++) {
                tmp[i] = 1 / b;
                b = (i < n - 1 ? 4.0 : 3.5) - tmp[i];
                x[i] = (rhs[i] - x[i - 1]) / b;
            }
            for (i = 1; i < n; i++) {
                // Backsubstitution.
                x[n - i - 1] -= tmp[n - i] * x[n - i];
            }
            return x;
        },

        // Solves an inversion problem -- Given the (x, y) coordinates of a point which lies on
        // a parametric curve x = x(t)/w(t), y = y(t)/w(t), find the parameter value t
        // which corresponds to that point.
        // @param control points (start, control start, control end, end)
        // @return a function accepts a point and returns t.
        getInversionSolver: function(p0, p1, p2, p3) {
            var pts = arguments;
            function l(i, j) {
                // calculates a determinant 3x3
                // [p.x  p.y  1]
                // [pi.x pi.y 1]
                // [pj.x pj.y 1]
                var pi = pts[i];
                var pj = pts[j];
                return function(p) {
                    var w = (i % 3 ? 3 : 1) * (j % 3 ? 3 : 1);
                    var lij = p.x * (pi.y - pj.y) + p.y * (pj.x - pi.x) + pi.x * pj.y - pi.y * pj.x;
                    return w * lij;
                };
            }
            return function solveInversion(p) {
                var ct = 3 * l(2, 3)(p1);
                var c1 = l(1, 3)(p0) / ct;
                var c2 = -l(2, 3)(p0) / ct;
                var la = c1 * l(3, 1)(p) + c2 * (l(3, 0)(p) + l(2, 1)(p)) + l(2, 0)(p);
                var lb = c1 * l(3, 0)(p) + c2 * l(2, 0)(p) + l(1, 0)(p);
                return lb / (lb - la);
            };
        },

        // Divide a Bezier curve into two at point defined by value 't' <0,1>.
        // Using deCasteljau algorithm. http://math.stackexchange.com/a/317867
        // @param control points (start, control start, control end, end)
        // @return a function accepts t and returns 2 curves each defined by 4 control points.
        getCurveDivider: function(p0, p1, p2, p3) {
            return function divideCurve(t) {
                var l = line(p0, p1).pointAt(t);
                var m = line(p1, p2).pointAt(t);
                var n = line(p2, p3).pointAt(t);
                var p = line(l, m).pointAt(t);
                var q = line(m, n).pointAt(t);
                var r = line(p, q).pointAt(t);
                return [{ p0: p0, p1: l, p2: p, p3: r }, { p0: r, p1: q, p2: n, p3: p3 }];
            };
        }
    };

    // Scale.
    var scale = {

        // Return the `value` from the `domain` interval scaled to the `range` interval.
        linear: function(domain, range, value) {

            var domainSpan = domain[1] - domain[0];
            var rangeSpan = range[1] - range[0];
            return (((value - domain[0]) / domainSpan) * rangeSpan + range[0]) || 0;
        }
    };

    return {
        toDeg: toDeg,
        toRad: toRad,
        snapToGrid: snapToGrid,
        normalizeAngle: normalizeAngle,
        point: point,
        line: line,
        rect: rect,
        ellipse: ellipse,
        bezier: bezier,
        scale: scale
    };

}));

//      JointJS library.
//      (c) 2011-2013 client IO

// Global namespace.

var joint = {

    version: '0.9.3',

    // `joint.dia` namespace.
    dia: {},

    // `joint.ui` namespace.
    ui: {},

    // `joint.layout` namespace.
    layout: {},

    // `joint.shapes` namespace.
    shapes: {},

    // `joint.format` namespace.
    format: {},

    // `joint.connectors` namespace.
    connectors: {},

    // `joint.routers` namespace.
    routers: {},

    util: {

        // Return a simple hash code from a string. See http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/.
        hashCode: function(str) {

            var hash = 0;
            if (str.length == 0) return hash;
            for (var i = 0; i < str.length; i++) {
                var c = str.charCodeAt(i);
                hash = ((hash << 5) - hash) + c;
                hash = hash & hash; // Convert to 32bit integer
            }
            return hash;
        },

        getByPath: function(obj, path, delim) {

            delim = delim || '/';
            var keys = path.split(delim);
            var key;

            while (keys.length) {
                key = keys.shift();
                if (Object(obj) === obj && key in obj) {
                    obj = obj[key];
                } else {
                    return undefined;
                }
            }
            return obj;
        },

        setByPath: function(obj, path, value, delim) {

            delim = delim || '/';

            var keys = path.split(delim);
            var diver = obj;
            var i = 0;

            if (path.indexOf(delim) > -1) {

                for (var len = keys.length; i < len - 1; i++) {
                    // diver creates an empty object if there is no nested object under such a key.
                    // This means that one can populate an empty nested object with setByPath().
                    diver = diver[keys[i]] || (diver[keys[i]] = {});
                }
                diver[keys[len - 1]] = value;
            } else {
                obj[path] = value;
            }
            return obj;
        },

        unsetByPath: function(obj, path, delim) {

            delim = delim || '/';

            // index of the last delimiter
            var i = path.lastIndexOf(delim);

            if (i > -1) {

                // unsetting a nested attribute
                var parent = joint.util.getByPath(obj, path.substr(0, i), delim);

                if (parent) {
                    delete parent[path.slice(i + 1)];
                }

            } else {

                // unsetting a primitive attribute
                delete obj[path];
            }

            return obj;
        },

        flattenObject: function(obj, delim, stop) {

            delim = delim || '/';
            var ret = {};

            for (var key in obj) {

                if (!obj.hasOwnProperty(key)) continue;

                var shouldGoDeeper = typeof obj[key] === 'object';
                if (shouldGoDeeper && stop && stop(obj[key])) {
                    shouldGoDeeper = false;
                }

                if (shouldGoDeeper) {

                    var flatObject = this.flattenObject(obj[key], delim, stop);

                    for (var flatKey in flatObject) {
                        if (!flatObject.hasOwnProperty(flatKey)) continue;
                        ret[key + delim + flatKey] = flatObject[flatKey];
                    }

                } else {

                    ret[key] = obj[key];
                }
            }

            return ret;
        },

        uuid: function() {

            // credit: http://stackoverflow.com/posts/2117523/revisions

            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
                var r = Math.random() * 16|0;
                var v = c == 'x' ? r : (r&0x3|0x8);
                return v.toString(16);
            });
        },

        // Generate global unique id for obj and store it as a property of the object.
        guid: function(obj) {

            this.guid.id = this.guid.id || 1;
            obj.id = (obj.id === undefined ? 'j_' + this.guid.id++ : obj.id);
            return obj.id;
        },

        // Copy all the properties to the first argument from the following arguments.
        // All the properties will be overwritten by the properties from the following
        // arguments. Inherited properties are ignored.
        mixin: function() {

            var target = arguments[0];

            for (var i = 1, l = arguments.length; i < l; i++) {

                var extension = arguments[i];

                // Only functions and objects can be mixined.

                if ((Object(extension) !== extension) &&
                    !_.isFunction(extension) &&
                    (extension === null || extension === undefined)) {

                    continue;
                }

                _.each(extension, function(copy, key) {

                    if (this.mixin.deep && (Object(copy) === copy)) {

                        if (!target[key]) {

                            target[key] = _.isArray(copy) ? [] : {};
                        }

                        this.mixin(target[key], copy);
                        return;
                    }

                    if (target[key] !== copy) {

                        if (!this.mixin.supplement || !target.hasOwnProperty(key)) {

                            target[key] = copy;
                        }

                    }

                }, this);
            }

            return target;
        },

        // Copy all properties to the first argument from the following
        // arguments only in case if they don't exists in the first argument.
        // All the function propererties in the first argument will get
        // additional property base pointing to the extenders same named
        // property function's call method.
        supplement: function() {

            this.mixin.supplement = true;
            var ret = this.mixin.apply(this, arguments);
            this.mixin.supplement = false;
            return ret;
        },

        // Same as `mixin()` but deep version.
        deepMixin: function() {

            this.mixin.deep = true;
            var ret = this.mixin.apply(this, arguments);
            this.mixin.deep = false;
            return ret;
        },

        // Same as `supplement()` but deep version.
        deepSupplement: function() {

            this.mixin.deep = this.mixin.supplement = true;
            var ret = this.mixin.apply(this, arguments);
            this.mixin.deep = this.mixin.supplement = false;
            return ret;
        },

        normalizeEvent: function(evt) {

            return (evt.originalEvent && evt.originalEvent.changedTouches && evt.originalEvent.changedTouches.length) ? evt.originalEvent.changedTouches[0] : evt;
        },

        nextFrame:(function() {

            var raf;
            var client = typeof window != 'undefined';

            if (client) {

                raf = window.requestAnimationFrame     ||
		    window.webkitRequestAnimationFrame ||
	            window.mozRequestAnimationFrame    ||
		    window.oRequestAnimationFrame      ||
		    window.msRequestAnimationFrame;
            }

            if (!raf) {

                var lastTime = 0;

                raf = function(callback) {

                    var currTime = new Date().getTime();
                    var timeToCall = Math.max(0, 16 - (currTime - lastTime));
                    var id = setTimeout(function() { callback(currTime + timeToCall); }, timeToCall);

                    lastTime = currTime + timeToCall;

                    return id;
                };
            }

            return client ? _.bind(raf, window) : raf;

        })(),

        cancelFrame: (function() {

            var caf;
            var client = typeof window != 'undefined';

            if (client) {

                caf = window.cancelAnimationFrame            ||
		    window.webkitCancelAnimationFrame        ||
	            window.webkitCancelRequestAnimationFrame ||
		    window.msCancelAnimationFrame            ||
	            window.msCancelRequestAnimationFrame     ||
		    window.oCancelAnimationFrame             ||
	            window.oCancelRequestAnimationFrame      ||
	            window.mozCancelAnimationFrame           ||
		    window.mozCancelRequestAnimationFrame;
            }

            caf = caf || clearTimeout;

            return client ? _.bind(caf, window) : caf;

        })(),

        shapePerimeterConnectionPoint: function(linkView, view, magnet, reference) {

            var bbox;
            var spot;

            if (!magnet) {

                // There is no magnet, try to make the best guess what is the
                // wrapping SVG element. This is because we want this "smart"
                // connection points to work out of the box without the
                // programmer to put magnet marks to any of the subelements.
                // For example, we want the functoin to work on basic.Path elements
                // without any special treatment of such elements.
                // The code below guesses the wrapping element based on
                // one simple assumption. The wrapping elemnet is the
                // first child of the scalable group if such a group exists
                // or the first child of the rotatable group if not.
                // This makese sense because usually the wrapping element
                // is below any other sub element in the shapes.
                var scalable = view.$('.scalable')[0];
                var rotatable = view.$('.rotatable')[0];

                if (scalable && scalable.firstChild) {

                    magnet = scalable.firstChild;

                } else if (rotatable && rotatable.firstChild) {

                    magnet = rotatable.firstChild;
                }
            }

            if (magnet) {

                spot = V(magnet).findIntersection(reference, linkView.paper.viewport);
                if (!spot) {
                    bbox = g.rect(V(magnet).bbox(false, linkView.paper.viewport));
                }

            } else {

                bbox = view.model.getBBox();
                spot = bbox.intersectionWithLineFromCenterToPoint(reference);
            }
            return spot || bbox.center();
        },

        breakText: function(text, size, styles, opt) {

            opt = opt || {};

            var width = size.width;
            var height = size.height;

            var svgDocument = opt.svgDocument || V('svg').node;
            var textElement = V('<text><tspan></tspan></text>').attr(styles || {}).node;
            var textSpan = textElement.firstChild;
            var textNode = document.createTextNode('');

            textSpan.appendChild(textNode);

            svgDocument.appendChild(textElement);

            if (!opt.svgDocument) {

                document.body.appendChild(svgDocument);
            }

            var words = text.split(' ');
            var full = [];
            var lines = [];
            var p;

            for (var i = 0, l = 0, len = words.length; i < len; i++) {

                var word = words[i];

                textNode.data = lines[l] ? lines[l] + ' ' + word : word;

                if (textSpan.getComputedTextLength() <= width) {

                    // the current line fits
                    lines[l] = textNode.data;

                    if (p) {
                        // We were partitioning. Put rest of the word onto next line
                        full[l++] = true;

                        // cancel partitioning
                        p = 0;
                    }

                } else {

                    if (!lines[l] || p) {

                        var partition = !!p;

                        p = word.length - 1;

                        if (partition || !p) {

                            // word has only one character.
                            if (!p) {

                                if (!lines[l]) {

                                    // we won't fit this text within our rect
                                    lines = [];

                                    break;
                                }

                                // partitioning didn't help on the non-empty line
                                // try again, but this time start with a new line

                                // cancel partitions created
                                words.splice(i, 2, word + words[i + 1]);

                                // adjust word length
                                len--;

                                full[l++] = true;
                                i--;

                                continue;
                            }

                            // move last letter to the beginning of the next word
                            words[i] = word.substring(0, p);
                            words[i + 1] = word.substring(p) + words[i + 1];

                        } else {

                            // We initiate partitioning
                            // split the long word into two words
                            words.splice(i, 1, word.substring(0, p), word.substring(p));

                            // adjust words length
                            len++;

                            if (l && !full[l - 1]) {
                                // if the previous line is not full, try to fit max part of
                                // the current word there
                                l--;
                            }
                        }

                        i--;

                        continue;
                    }

                    l++;
                    i--;
                }

                // if size.height is defined we have to check whether the height of the entire
                // text exceeds the rect height
                if (typeof height !== 'undefined') {

                    // get line height as text height / 0.8 (as text height is approx. 0.8em
                    // and line height is 1em. See vectorizer.text())
                    var lh = lh || textElement.getBBox().height * 1.25;

                    if (lh * lines.length > height) {

                        // remove overflowing lines
                        lines.splice(Math.floor(height / lh));

                        break;
                    }
                }
            }

            if (opt.svgDocument) {

                // svg document was provided, remove the text element only
                svgDocument.removeChild(textElement);

            } else {

                // clean svg document
                document.body.removeChild(svgDocument);
            }

            return lines.join('\n');
        },

        imageToDataUri: function(url, callback) {

            if (!url || url.substr(0, 'data:'.length) === 'data:') {
                // No need to convert to data uri if it is already in data uri.

                // This not only convenient but desired. For example,
                // IE throws a security error if data:image/svg+xml is used to render
                // an image to the canvas and an attempt is made to read out data uri.
                // Now if our image is already in data uri, there is no need to render it to the canvas
                // and so we can bypass this error.

                // Keep the async nature of the function.
                return setTimeout(function() { callback(null, url); }, 0);
            }

            var canvas = document.createElement('canvas');
            var img = document.createElement('img');

            img.onload = function() {

                var ctx = canvas.getContext('2d');

                canvas.width = img.width;
                canvas.height = img.height;

                ctx.drawImage(img, 0, 0);

                try {

                    // Guess the type of the image from the url suffix.
                    var suffix = (url.split('.').pop()) || 'png';
                    // A little correction for JPEGs. There is no image/jpg mime type but image/jpeg.
                    var type = 'image/' + (suffix === 'jpg') ? 'jpeg' : suffix;
                    var dataUri = canvas.toDataURL(type);

                } catch (e) {

                    if (/\.svg$/.test(url)) {
                        // IE throws a security error if we try to render an SVG into the canvas.
                        // Luckily for us, we don't need canvas at all to convert
                        // SVG to data uri. We can just use AJAX to load the SVG string
                        // and construct the data uri ourselves.
                        var xhr = window.XMLHttpRequest ? new XMLHttpRequest : new ActiveXObject('Microsoft.XMLHTTP');
                        xhr.open('GET', url, false);
                        xhr.send(null);
                        var svg = xhr.responseText;

                        return callback(null, 'data:image/svg+xml,' + encodeURIComponent(svg));
                    }

                    console.error(img.src, 'fails to convert', e);
                }

                callback(null, dataUri);
            };

            img.ononerror = function() {

                callback(new Error('Failed to load image.'));
            };

            img.src = url;
        },

        getElementBBox: function(el) {

            var $el = $(el);
            var offset = $el.offset();
            var bbox;

            if (el.ownerSVGElement) {

                // Use Vectorizer to get the dimensions of the element if it is an SVG element.
                bbox = V(el).bbox();

                // getBoundingClientRect() used in jQuery.fn.offset() takes into account `stroke-width`
                // in Firefox only. So clientRect width/height and getBBox width/height in FF don't match.
                // To unify this across all browsers we add the `stroke-width` (left & top) back to
                // the calculated offset.
                var crect = el.getBoundingClientRect();
                var strokeWidthX = (crect.width - bbox.width) / 2;
                var strokeWidthY = (crect.height - bbox.height) / 2;

                // The `bbox()` returns coordinates relative to the SVG viewport, therefore, use the
                // ones returned from the `offset()` method that are relative to the document.
                bbox.x = offset.left + strokeWidthX;
                bbox.y = offset.top + strokeWidthY;

            } else {

                bbox = { x: offset.left, y: offset.top, width: $el.outerWidth(), height: $el.outerHeight() };
            }

            return bbox;
        },


        // Highly inspired by the jquery.sortElements plugin by Padolsey.
        // See http://james.padolsey.com/javascript/sorting-elements-with-jquery/.
        sortElements: function(elements, comparator) {

            var $elements = $(elements);
            var placements = $elements.map(function() {

                var sortElement = this;
                var parentNode = sortElement.parentNode;
                // Since the element itself will change position, we have
                // to have some way of storing it's original position in
                // the DOM. The easiest way is to have a 'flag' node:
                var nextSibling = parentNode.insertBefore(document.createTextNode(''), sortElement.nextSibling);

                return function() {

                    if (parentNode === this) {
                        throw new Error('You can\'t sort elements if any one is a descendant of another.');
                    }

                    // Insert before flag:
                    parentNode.insertBefore(this, nextSibling);
                    // Remove flag:
                    parentNode.removeChild(nextSibling);
                };
            });

            return Array.prototype.sort.call($elements, comparator).each(function(i) {
                placements[i].call(this);
            });
        },

        // Return a new object with all for sides (top, bottom, left and right) in it.
        // Value of each side is taken from the given argument (either number or object).
        // Default value for a side is 0.
        // Examples:
        // joint.util.normalizeSides(5) --> { top: 5, left: 5, right: 5, bottom: 5 }
        // joint.util.normalizeSides({ left: 5 }) --> { top: 0, left: 5, right: 0, bottom: 0 }
        normalizeSides: function(box) {

            if (Object(box) !== box) {
                box = box || 0;
                return { top: box, bottom: box, left: box, right: box };
            }

            return {
                top: box.top || 0,
                bottom: box.bottom || 0,
                left: box.left || 0,
                right: box.right || 0
            };
        },

        timing: {

            linear: function(t) {
                return t;
            },

            quad: function(t) {
                return t * t;
            },

            cubic: function(t) {
                return t * t * t;
            },

            inout: function(t) {
                if (t <= 0) return 0;
                if (t >= 1) return 1;
                var t2 = t * t;
                var t3 = t2 * t;
                return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75);
            },

            exponential: function(t) {
                return Math.pow(2, 10 * (t - 1));
            },

            bounce: function(t) {
                for (var a = 0, b = 1; 1; a += b, b /= 2) {
                    if (t >= (7 - 4 * a) / 11) {
                        var q = (11 - 6 * a - 11 * t) / 4;
                        return -q * q + b * b;
                    }
                }
            },

            reverse: function(f) {
                return function(t) {
                    return 1 - f(1 - t);
                };
            },

            reflect: function(f) {
                return function(t) {
                    return .5 * (t < .5 ? f(2 * t) : (2 - f(2 - 2 * t)));
                };
            },

            clamp: function(f, n, x) {
                n = n || 0;
                x = x || 1;
                return function(t) {
                    var r = f(t);
                    return r < n ? n : r > x ? x : r;
                };
            },

            back: function(s) {
                if (!s) s = 1.70158;
                return function(t) {
                    return t * t * ((s + 1) * t - s);
                };
            },

            elastic: function(x) {
                if (!x) x = 1.5;
                return function(t) {
                    return Math.pow(2, 10 * (t - 1)) * Math.cos(20 * Math.PI * x / 3 * t);
                };
            }
        },

        interpolate: {

            number: function(a, b) {
                var d = b - a;
                return function(t) { return a + d * t; };
            },

            object: function(a, b) {
                var s = _.keys(a);
                return function(t) {
                    var i, p;
                    var r = {};
                    for (i = s.length - 1; i != -1; i--) {
                        p = s[i];
                        r[p] = a[p] + (b[p] - a[p]) * t;
                    }
                    return r;
                };
            },

            hexColor: function(a, b) {

                var ca = parseInt(a.slice(1), 16);
                var cb = parseInt(b.slice(1), 16);
                var ra = ca & 0x0000ff;
                var rd = (cb & 0x0000ff) - ra;
                var ga = ca & 0x00ff00;
                var gd = (cb & 0x00ff00) - ga;
                var ba = ca & 0xff0000;
                var bd = (cb & 0xff0000) - ba;

                return function(t) {

                    var r = (ra + rd * t) & 0x000000ff;
                    var g = (ga + gd * t) & 0x0000ff00;
                    var b = (ba + bd * t) & 0x00ff0000;

                    return '#' + (1 << 24 | r | g | b ).toString(16).slice(1);
                };
            },

            unit: function(a, b) {

                var r = /(-?[0-9]*.[0-9]*)(px|em|cm|mm|in|pt|pc|%)/;
                var ma = r.exec(a);
                var mb = r.exec(b);
                var p = mb[1].indexOf('.');
                var f = p > 0 ? mb[1].length - p - 1 : 0;
                a = +ma[1];
                var d = +mb[1] - a;
                var u = ma[2];

                return function(t) {
                    return (a + d * t).toFixed(f) + u;
                };
            }
        },

        // SVG filters.
        filter: {

            // `color` ... outline color
            // `width`... outline width
            // `opacity` ... outline opacity
            // `margin` ... gap between outline and the element
            outline: function(args) {

                var tpl = '<filter><feFlood flood-color="${color}" flood-opacity="${opacity}" result="colored"/><feMorphology in="SourceAlpha" result="morphedOuter" operator="dilate" radius="${outerRadius}" /><feMorphology in="SourceAlpha" result="morphedInner" operator="dilate" radius="${innerRadius}" /><feComposite result="morphedOuterColored" in="colored" in2="morphedOuter" operator="in"/><feComposite operator="xor" in="morphedOuterColored" in2="morphedInner" result="outline"/><feMerge><feMergeNode in="outline"/><feMergeNode in="SourceGraphic"/></feMerge></filter>';

                var margin = _.isFinite(args.margin) ? args.margin : 2;
                var width = _.isFinite(args.width) ? args.width : 1;

                return _.template(tpl, {
                    color: args.color || 'blue',
                    opacity: _.isFinite(args.opacity) ? args.opacity : 1,
                    outerRadius: margin + width,
                    innerRadius: margin
                });
            },

            // `color` ... color
            // `width`... width
            // `blur` ... blur
            // `opacity` ... opacity
            highlight: function(args) {

                var tpl = '<filter><feFlood flood-color="${color}" flood-opacity="${opacity}" result="colored"/><feMorphology result="morphed" in="SourceGraphic" operator="dilate" radius="${width}"/><feComposite result="composed" in="colored" in2="morphed" operator="in"/><feGaussianBlur result="blured" in="composed" stdDeviation="${blur}"/><feBlend in="SourceGraphic" in2="blured" mode="normal"/></filter>';

                return _.template(tpl, {
                    color: args.color || 'red',
                    width: _.isFinite(args.width) ? args.width : 1,
                    blur: _.isFinite(args.blur) ? args.blur : 0,
                    opacity: _.isFinite(args.opacity) ? args.opacity : 1
                });
            },

            // `x` ... horizontal blur
            // `y` ... vertical blur (optional)
            blur: function(args) {

                var x = _.isFinite(args.x) ? args.x : 2;

                return _.template('<filter><feGaussianBlur stdDeviation="${stdDeviation}"/></filter>', {
                    stdDeviation: _.isFinite(args.y) ? [x, args.y] : x
                });
            },

            // `dx` ... horizontal shift
            // `dy` ... vertical shift
            // `blur` ... blur
            // `color` ... color
            // `opacity` ... opacity
            dropShadow: function(args) {

                var tpl = 'SVGFEDropShadowElement' in window
                    ? '<filter><feDropShadow stdDeviation="${blur}" dx="${dx}" dy="${dy}" flood-color="${color}" flood-opacity="${opacity}"/></filter>'
                    : '<filter><feGaussianBlur in="SourceAlpha" stdDeviation="${blur}"/><feOffset dx="${dx}" dy="${dy}" result="offsetblur"/><feFlood flood-color="${color}"/><feComposite in2="offsetblur" operator="in"/><feComponentTransfer><feFuncA type="linear" slope="${opacity}"/></feComponentTransfer><feMerge><feMergeNode/><feMergeNode in="SourceGraphic"/></feMerge></filter>';

                return _.template(tpl, {
                    dx: args.dx || 0,
                    dy: args.dy || 0,
                    opacity: _.isFinite(args.opacity) ? args.opacity : 1,
                    color: args.color || 'black',
                    blur: _.isFinite(args.blur) ? args.blur : 4
                });
            },

            // `amount` ... the proportion of the conversion. A value of 1 is completely grayscale. A value of 0 leaves the input unchanged.
            grayscale: function(args) {

                var amount = _.isFinite(args.amount) ? args.amount : 1;

                return _.template('<filter><feColorMatrix type="matrix" values="${a} ${b} ${c} 0 0 ${d} ${e} ${f} 0 0 ${g} ${b} ${h} 0 0 0 0 0 1 0"/></filter>', {
                    a: 0.2126 + 0.7874 * (1 - amount),
                    b: 0.7152 - 0.7152 * (1 - amount),
                    c: 0.0722 - 0.0722 * (1 - amount),
                    d: 0.2126 - 0.2126 * (1 - amount),
                    e: 0.7152 + 0.2848 * (1 - amount),
                    f: 0.0722 - 0.0722 * (1 - amount),
                    g: 0.2126 - 0.2126 * (1 - amount),
                    h: 0.0722 + 0.9278 * (1 - amount)
                });
            },

            // `amount` ... the proportion of the conversion. A value of 1 is completely sepia. A value of 0 leaves the input unchanged.
            sepia: function(args) {

                var amount = _.isFinite(args.amount) ? args.amount : 1;

                return _.template('<filter><feColorMatrix type="matrix" values="${a} ${b} ${c} 0 0 ${d} ${e} ${f} 0 0 ${g} ${h} ${i} 0 0 0 0 0 1 0"/></filter>', {
                    a: 0.393 + 0.607 * (1 - amount),
                    b: 0.769 - 0.769 * (1 - amount),
                    c: 0.189 - 0.189 * (1 - amount),
                    d: 0.349 - 0.349 * (1 - amount),
                    e: 0.686 + 0.314 * (1 - amount),
                    f: 0.168 - 0.168 * (1 - amount),
                    g: 0.272 - 0.272 * (1 - amount),
                    h: 0.534 - 0.534 * (1 - amount),
                    i: 0.131 + 0.869 * (1 - amount)
                });
            },

            // `amount` ... the proportion of the conversion. A value of 0 is completely un-saturated. A value of 1 leaves the input unchanged.
            saturate: function(args) {

                var amount = _.isFinite(args.amount) ? args.amount : 1;

                return _.template('<filter><feColorMatrix type="saturate" values="${amount}"/></filter>', {
                    amount: 1 - amount
                });
            },

            // `angle` ...  the number of degrees around the color circle the input samples will be adjusted.
            hueRotate: function(args) {

                return _.template('<filter><feColorMatrix type="hueRotate" values="${angle}"/></filter>', {
                    angle: args.angle || 0
                });
            },

            // `amount` ... the proportion of the conversion. A value of 1 is completely inverted. A value of 0 leaves the input unchanged.
            invert: function(args) {

                var amount = _.isFinite(args.amount) ? args.amount : 1;

                return _.template('<filter><feComponentTransfer><feFuncR type="table" tableValues="${amount} ${amount2}"/><feFuncG type="table" tableValues="${amount} ${amount2}"/><feFuncB type="table" tableValues="${amount} ${amount2}"/></feComponentTransfer></filter>', {
                    amount: amount,
                    amount2: 1 - amount
                });
            },

            // `amount` ... proportion of the conversion. A value of 0 will create an image that is completely black. A value of 1 leaves the input unchanged.
            brightness: function(args) {

                return _.template('<filter><feComponentTransfer><feFuncR type="linear" slope="${amount}"/><feFuncG type="linear" slope="${amount}"/><feFuncB type="linear" slope="${amount}"/></feComponentTransfer></filter>', {
                    amount: _.isFinite(args.amount) ? args.amount : 1
                });
            },

            // `amount` ... proportion of the conversion. A value of 0 will create an image that is completely black. A value of 1 leaves the input unchanged.
            contrast: function(args) {

                var amount = _.isFinite(args.amount) ? args.amount : 1;

                return _.template('<filter><feComponentTransfer><feFuncR type="linear" slope="${amount}" intercept="${amount2}"/><feFuncG type="linear" slope="${amount}" intercept="${amount2}"/><feFuncB type="linear" slope="${amount}" intercept="${amount2}"/></feComponentTransfer></filter>', {
                    amount: amount,
                    amount2: .5 - amount / 2
                });
            }
        },

        format: {

            // Formatting numbers via the Python Format Specification Mini-language.
            // See http://docs.python.org/release/3.1.3/library/string.html#format-specification-mini-language.
            // Heavilly inspired by the D3.js library implementation.
            number: function(specifier, value, locale) {

                locale = locale || {

                    currency: ['$', ''],
                    decimal: '.',
                    thousands: ',',
                    grouping: [3]
                };

                // See Python format specification mini-language: http://docs.python.org/release/3.1.3/library/string.html#format-specification-mini-language.
                // [[fill]align][sign][symbol][0][width][,][.precision][type]
                var re = /(?:([^{])?([<>=^]))?([+\- ])?([$#])?(0)?(\d+)?(,)?(\.-?\d+)?([a-z%])?/i;

                var match = re.exec(specifier);
                var fill = match[1] || ' ';
                var align = match[2] || '>';
                var sign = match[3] || '';
                var symbol = match[4] || '';
                var zfill = match[5];
                var width = +match[6];
                var comma = match[7];
                var precision = match[8];
                var type = match[9];
                var scale = 1;
                var prefix = '';
                var suffix = '';
                var integer = false;

                if (precision) precision = +precision.substring(1);

                if (zfill || fill === '0' && align === '=') {
                    zfill = fill = '0';
                    align = '=';
                    if (comma) width -= Math.floor((width - 1) / 4);
                }

                switch (type) {
                    case 'n': comma = true; type = 'g'; break;
                    case '%': scale = 100; suffix = '%'; type = 'f'; break;
                    case 'p': scale = 100; suffix = '%'; type = 'r'; break;
                    case 'b':
                    case 'o':
                    case 'x':
                    case 'X': if (symbol === '#') prefix = '0' + type.toLowerCase();
                    case 'c':
                    case 'd': integer = true; precision = 0; break;
                    case 's': scale = -1; type = 'r'; break;
                }

                if (symbol === '$') {
                    prefix = locale.currency[0];
                    suffix = locale.currency[1];
                }

                // If no precision is specified for `'r'`, fallback to general notation.
                if (type == 'r' && !precision) type = 'g';

                // Ensure that the requested precision is in the supported range.
                if (precision != null) {
                    if (type == 'g') precision = Math.max(1, Math.min(21, precision));
                    else if (type == 'e' || type == 'f') precision = Math.max(0, Math.min(20, precision));
                }

                var zcomma = zfill && comma;

                // Return the empty string for floats formatted as ints.
                if (integer && (value % 1)) return '';

                // Convert negative to positive, and record the sign prefix.
                var negative = value < 0 || value === 0 && 1 / value < 0 ? (value = -value, '-') : sign;

                var fullSuffix = suffix;

                // Apply the scale, computing it from the value's exponent for si format.
                // Preserve the existing suffix, if any, such as the currency symbol.
                if (scale < 0) {
                    var unit = this.prefix(value, precision);
                    value = unit.scale(value);
                    fullSuffix = unit.symbol + suffix;
                } else {
                    value *= scale;
                }

                // Convert to the desired precision.
                value = this.convert(type, value, precision);

                // Break the value into the integer part (before) and decimal part (after).
                var i = value.lastIndexOf('.');
                var before = i < 0 ? value : value.substring(0, i);
                var after = i < 0 ? '' : locale.decimal + value.substring(i + 1);

                function formatGroup(value) {

                    var i = value.length;
                    var t = [];
                    var j = 0;
                    var g = locale.grouping[0];
                    while (i > 0 && g > 0) {
                        t.push(value.substring(i -= g, i + g));
                        g = locale.grouping[j = (j + 1) % locale.grouping.length];
                    }
                    return t.reverse().join(locale.thousands);
                }

                // If the fill character is not `'0'`, grouping is applied before padding.
                if (!zfill && comma && locale.grouping) {

                    before = formatGroup(before);
                }

                var length = prefix.length + before.length + after.length + (zcomma ? 0 : negative.length);
                var padding = length < width ? new Array(length = width - length + 1).join(fill) : '';

                // If the fill character is `'0'`, grouping is applied after padding.
                if (zcomma) before = formatGroup(padding + before);

                // Apply prefix.
                negative += prefix;

                // Rejoin integer and decimal parts.
                value = before + after;

                return (align === '<' ? negative + value + padding
                        : align === '>' ? padding + negative + value
                        : align === '^' ? padding.substring(0, length >>= 1) + negative + value + padding.substring(length)
                        : negative + (zcomma ? value : padding + value)) + fullSuffix;
            },

            // Formatting string via the Python Format string.
            // See https://docs.python.org/2/library/string.html#format-string-syntax)
            string: function(formatString, value) {

                var fieldDelimiterIndex;
                var fieldDelimiter = '{';
                var endPlaceholder = false;
                var formattedStringArray = [];

                while ((fieldDelimiterIndex = formatString.indexOf(fieldDelimiter)) !== -1) {

                    var pieceFormatedString, formatSpec, fieldName;

                    pieceFormatedString = formatString.slice(0, fieldDelimiterIndex);

                    if (endPlaceholder) {
                        formatSpec = pieceFormatedString.split(':');
                        fieldName = formatSpec.shift().split('.');
                        pieceFormatedString = value;

                        for (var i = 0; i < fieldName.length; i++)
                            pieceFormatedString = pieceFormatedString[fieldName[i]];

                        if (formatSpec.length)
                            pieceFormatedString = this.number(formatSpec, pieceFormatedString);
                    }

                    formattedStringArray.push(pieceFormatedString);

                    formatString = formatString.slice(fieldDelimiterIndex + 1);
                    fieldDelimiter = (endPlaceholder = !endPlaceholder) ? '}' : '{';
                }
                formattedStringArray.push(formatString);

                return formattedStringArray.join('');
            },

            convert: function(type, value, precision) {

                switch (type) {
                    case 'b': return value.toString(2);
                    case 'c': return String.fromCharCode(value);
                    case 'o': return value.toString(8);
                    case 'x': return value.toString(16);
                    case 'X': return value.toString(16).toUpperCase();
                    case 'g': return value.toPrecision(precision);
                    case 'e': return value.toExponential(precision);
                    case 'f': return value.toFixed(precision);
                    case 'r': return (value = this.round(value, this.precision(value, precision))).toFixed(Math.max(0, Math.min(20, this.precision(value * (1 + 1e-15), precision))));
                    default: return value + '';
                }
            },

            round: function(value, precision) {

                return precision
                    ? Math.round(value * (precision = Math.pow(10, precision))) / precision
                    : Math.round(value);
            },

            precision: function(value, precision) {

                return precision - (value ? Math.ceil(Math.log(value) / Math.LN10) : 1);
            },

            prefix: function(value, precision) {

                var prefixes = _.map(['y', 'z', 'a', 'f', 'p', 'n', 'µ', 'm', '', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'], function(d, i) {
                    var k = Math.pow(10, abs(8 - i) * 3);
                    return {
                        scale: i > 8 ? function(d) { return d / k; } : function(d) { return d * k; },
                        symbol: d
                    };
                });

                var i = 0;
                if (value) {
                    if (value < 0) value *= -1;
                    if (precision) value = this.round(value, this.precision(value, precision));
                    i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10);
                    i = Math.max(-24, Math.min(24, Math.floor((i <= 0 ? i + 1 : i - 1) / 3) * 3));
                }
                return prefixes[8 + i / 3];
            }
        }
    }
};

//      JointJS, the JavaScript diagramming library.
//      (c) 2011-2013 client IO

joint.dia.GraphCells = Backbone.Collection.extend({

    initialize: function() {

        // Backbone automatically doesn't trigger re-sort if models attributes are changed later when
        // they're already in the collection. Therefore, we're triggering sort manually here.
        this.on('change:z', this.sort, this);
    },

    model: function(attrs, options) {

        if (attrs.type === 'link') {

            return new joint.dia.Link(attrs, options);
        }

        var module = attrs.type.split('.')[0];
        var entity = attrs.type.split('.')[1];

        if (joint.shapes[module] && joint.shapes[module][entity]) {

            return new joint.shapes[module][entity](attrs, options);
        }

        return new joint.dia.Element(attrs, options);
    },

    // `comparator` makes it easy to sort cells based on their `z` index.
    comparator: function(model) {

        return model.get('z') || 0;
    },

    // Get all inbound and outbound links connected to the cell `model`.
    getConnectedLinks: function(model, opt) {

        opt = opt || {};

        if (_.isUndefined(opt.inbound) && _.isUndefined(opt.outbound)) {
            opt.inbound = opt.outbound = true;
        }

        var links = this.filter(function(cell) {

            var source = cell.get('source');
            var target = cell.get('target');

            return (source && source.id === model.id && opt.outbound) ||
                (target && target.id === model.id  && opt.inbound);
        });

        // option 'deep' returns all links that are connected to any of the descendent cell
        // and are not descendents itself
        if (opt.deep) {

            var embeddedCells = model.getEmbeddedCells({ deep: true });

            _.each(this.difference(links, embeddedCells), function(cell) {

                if (opt.outbound) {

                    var source = cell.get('source');

                    if (source && source.id && _.find(embeddedCells, { id: source.id })) {
                        links.push(cell);
                        return; // prevent a loop link to be pushed twice
                    }
                }

                if (opt.inbound) {

                    var target = cell.get('target');

                    if (target && target.id && _.find(embeddedCells, { id: target.id })) {
                        links.push(cell);
                    }
                }
            });
        }

        return links;
    },

    getCommonAncestor: function(/* cells */) {

        var cellsAncestors = _.map(arguments, function(cell) {

            var ancestors = [cell.id];
            var parentId = cell.get('parent');

            while (parentId) {

                ancestors.push(parentId);
                parentId = this.get(parentId).get('parent');
            }

            return ancestors;

        }, this);

        cellsAncestors = _.sortBy(cellsAncestors, 'length');

        var commonAncestor = _.find(cellsAncestors.shift(), function(ancestor) {

            return _.every(cellsAncestors, function(cellAncestors) {
                return _.contains(cellAncestors, ancestor);
            });
        });

        return this.get(commonAncestor);
    },

    // Return the bounding box of all cells in array provided. If no array
    // provided returns bounding box of all cells. Links are being ignored.
    getBBox: function(cells) {

        cells = cells || this.models;

        var origin = { x: Infinity, y: Infinity };
        var corner = { x: -Infinity, y: -Infinity };

        _.each(cells, function(cell) {

            // Links has no bounding box defined on the model.
            if (cell.isLink()) return;

            var bbox = cell.getBBox();
            origin.x = Math.min(origin.x, bbox.x);
            origin.y = Math.min(origin.y, bbox.y);
            corner.x = Math.max(corner.x, bbox.x + bbox.width);
            corner.y = Math.max(corner.y, bbox.y + bbox.height);
        });

        return g.rect(origin.x, origin.y, corner.x - origin.x, corner.y - origin.y);
    }
});


joint.dia.Graph = Backbone.Model.extend({

    initialize: function(attrs, opt) {

        // Passing `cellModel` function in the options object to graph allows for
        // setting models based on attribute objects. This is especially handy
        // when processing JSON graphs that are in a different than JointJS format.
        this.set('cells', new joint.dia.GraphCells([], { model: opt && opt.cellModel }));

        // Make all the events fired in the `cells` collection available.
        // to the outside world.
        this.get('cells').on('all', this.trigger, this);

        this.get('cells').on('remove', this.removeCell, this);
    },

    toJSON: function() {

        // Backbone does not recursively call `toJSON()` on attributes that are themselves models/collections.
        // It just clones the attributes. Therefore, we must call `toJSON()` on the cells collection explicitely.
        var json = Backbone.Model.prototype.toJSON.apply(this, arguments);
        json.cells = this.get('cells').toJSON();
        return json;
    },

    fromJSON: function(json, opt) {

        if (!json.cells) {

            throw new Error('Graph JSON must contain cells array.');
        }

        this.set(_.omit(json, 'cells'), opt);
        this.resetCells(json.cells, opt);
    },

    clear: function(opt) {

        this.trigger('batch:start');
        this.get('cells').remove(this.get('cells').models, opt);
        this.trigger('batch:stop');
    },

    _prepareCell: function(cell) {

        if (cell instanceof Backbone.Model && _.isUndefined(cell.get('z'))) {

            cell.set('z', this.maxZIndex() + 1, { silent: true });

        } else if (_.isUndefined(cell.z)) {

            cell.z = this.maxZIndex() + 1;
        }

        return cell;
    },

    maxZIndex: function() {

        var lastCell = this.get('cells').last();
        return lastCell ? (lastCell.get('z') || 0) : 0;
    },

    addCell: function(cell, options) {

        if (_.isArray(cell)) {

            return this.addCells(cell, options);
        }

        this.get('cells').add(this._prepareCell(cell), options || {});

        return this;
    },

    addCells: function(cells, options) {

        options = options || {};
        options.position = cells.length;

        _.each(cells, function(cell) {
            options.position--;
            this.addCell(cell, options);
        }, this);

        return this;
    },

    // When adding a lot of cells, it is much more efficient to
    // reset the entire cells collection in one go.
    // Useful for bulk operations and optimizations.
    resetCells: function(cells, opt) {

        this.get('cells').reset(_.map(cells, this._prepareCell, this), opt);

        return this;
    },

    removeCell: function(cell, collection, options) {

        // Applications might provide a `disconnectLinks` option set to `true` in order to
        // disconnect links when a cell is removed rather then removing them. The default
        // is to remove all the associated links.
        if (options && options.disconnectLinks) {

            this.disconnectLinks(cell, options);

        } else {

            this.removeLinks(cell, options);
        }

        // Silently remove the cell from the cells collection. Silently, because
        // `joint.dia.Cell.prototype.remove` already triggers the `remove` event which is
        // then propagated to the graph model. If we didn't remove the cell silently, two `remove` events
        // would be triggered on the graph model.
        this.get('cells').remove(cell, { silent: true });
    },

    // Get a cell by `id`.
    getCell: function(id) {

        return this.get('cells').get(id);
    },

    getElements: function() {

        return this.get('cells').filter(function(cell) {

            return cell instanceof joint.dia.Element;
        });
    },

    getLinks: function() {

        return this.get('cells').filter(function(cell) {

            return cell instanceof joint.dia.Link;
        });
    },

    // Get all inbound and outbound links connected to the cell `model`.
    getConnectedLinks: function(model, opt) {

        return this.get('cells').getConnectedLinks(model, opt);
    },

    getNeighbors: function(el) {

        var links = this.getConnectedLinks(el);
        var neighbors = [];
        var cells = this.get('cells');

        _.each(links, function(link) {

            var source = link.get('source');
            var target = link.get('target');

            // Discard if it is a point.
            if (!source.x) {
                var sourceElement = cells.get(source.id);
                if (sourceElement !== el) {

                    neighbors.push(sourceElement);
                }
            }
            if (!target.x) {
                var targetElement = cells.get(target.id);
                if (targetElement !== el) {

                    neighbors.push(targetElement);
                }
            }
        });

        return neighbors;
    },

    // Disconnect links connected to the cell `model`.
    disconnectLinks: function(model, options) {

        _.each(this.getConnectedLinks(model), function(link) {

            link.set(link.get('source').id === model.id ? 'source' : 'target', g.point(0, 0), options);
        });
    },

    // Remove links connected to the cell `model` completely.
    removeLinks: function(model, options) {

        _.invoke(this.getConnectedLinks(model), 'remove', options);
    },

    // Find all views at given point
    findModelsFromPoint: function(p) {

        return _.filter(this.getElements(), function(el) {
            return el.getBBox().containsPoint(p);
        });
    },

    // Find all views in given area
    findModelsInArea: function(r) {

        return _.filter(this.getElements(), function(el) {
            return el.getBBox().intersect(r);
        });
    },

    // Return the bounding box of all `elements`.
    getBBox: function(/* elements */) {

        var collection = this.get('cells');
        return collection.getBBox.apply(collection, arguments);
    },

    getCommonAncestor: function(/* cells */) {

        var collection = this.get('cells');
        return collection.getCommonAncestor.apply(collection, arguments);
    }
});

//      JointJS.
//      (c) 2011-2013 client IO

// joint.dia.Cell base model.
// --------------------------

joint.dia.Cell = Backbone.Model.extend({

    // This is the same as Backbone.Model with the only difference that is uses _.merge
    // instead of just _.extend. The reason is that we want to mixin attributes set in upper classes.
    constructor: function(attributes, options) {

        var defaults;
        var attrs = attributes || {};
        this.cid = _.uniqueId('c');
        this.attributes = {};
        if (options && options.collection) this.collection = options.collection;
        if (options && options.parse) attrs = this.parse(attrs, options) || {};
        if (defaults = _.result(this, 'defaults')) {
            //<custom code>
            // Replaced the call to _.defaults with _.merge.
            attrs = _.merge({}, defaults, attrs);
            //</custom code>
        }
        this.set(attrs, options);
        this.changed = {};
        this.initialize.apply(this, arguments);
    },

    toJSON: function() {

        var defaultAttrs = this.constructor.prototype.defaults.attrs || {};
        var attrs = this.attributes.attrs;
        var finalAttrs = {};

        // Loop through all the attributes and
        // omit the default attributes as they are implicitly reconstructable by the cell 'type'.
        _.each(attrs, function(attr, selector) {

            var defaultAttr = defaultAttrs[selector];

            _.each(attr, function(value, name) {

                // attr is mainly flat though it might have one more level (consider the `style` attribute).
                // Check if the `value` is object and if yes, go one level deep.
                if (_.isObject(value) && !_.isArray(value)) {

                    _.each(value, function(value2, name2) {

                        if (!defaultAttr || !defaultAttr[name] || !_.isEqual(defaultAttr[name][name2], value2)) {

                            finalAttrs[selector] = finalAttrs[selector] || {};
                            (finalAttrs[selector][name] || (finalAttrs[selector][name] = {}))[name2] = value2;
                        }
                    });

                } else if (!defaultAttr || !_.isEqual(defaultAttr[name], value)) {
                    // `value` is not an object, default attribute for such a selector does not exist
                    // or it is different than the attribute value set on the model.

                    finalAttrs[selector] = finalAttrs[selector] || {};
                    finalAttrs[selector][name] = value;
                }
            });
        });

        var attributes = _.cloneDeep(_.omit(this.attributes, 'attrs'));
        //var attributes = JSON.parse(JSON.stringify(_.omit(this.attributes, 'attrs')));
        attributes.attrs = finalAttrs;

        return attributes;
    },

    initialize: function(options) {

        if (!options || !options.id) {

            this.set('id', joint.util.uuid(), { silent: true });
        }

        this._transitionIds = {};

        // Collect ports defined in `attrs` and keep collecting whenever `attrs` object changes.
        this.processPorts();
        this.on('change:attrs', this.processPorts, this);
    },

    processPorts: function() {

        // Whenever `attrs` changes, we extract ports from the `attrs` object and store it
        // in a more accessible way. Also, if any port got removed and there were links that had `target`/`source`
        // set to that port, we remove those links as well (to follow the same behaviour as
        // with a removed element).

        var previousPorts = this.ports;

        // Collect ports from the `attrs` object.
        var ports = {};
        _.each(this.get('attrs'), function(attrs, selector) {

            if (attrs && attrs.port) {

                // `port` can either be directly an `id` or an object containing an `id` (and potentially other data).
                if (!_.isUndefined(attrs.port.id)) {
                    ports[attrs.port.id] = attrs.port;
                } else {
                    ports[attrs.port] = { id: attrs.port };
                }
            }
        });

        // Collect ports that have been removed (compared to the previous ports) - if any.
        // Use hash table for quick lookup.
        var removedPorts = {};
        _.each(previousPorts, function(port, id) {

            if (!ports[id]) removedPorts[id] = true;
        });

        // Remove all the incoming/outgoing links that have source/target port set to any of the removed ports.
        if (this.collection && !_.isEmpty(removedPorts)) {

            var inboundLinks = this.collection.getConnectedLinks(this, { inbound: true });
            _.each(inboundLinks, function(link) {

                if (removedPorts[link.get('target').port]) link.remove();
            });

            var outboundLinks = this.collection.getConnectedLinks(this, { outbound: true });
            _.each(outboundLinks, function(link) {

                if (removedPorts[link.get('source').port]) link.remove();
            });
        }

        // Update the `ports` object.
        this.ports = ports;
    },

    remove: function(opt) {

        opt = opt || {};

        var collection = this.collection;

        if (collection) {
            collection.trigger('batch:start', { batchName: 'remove' });
        }

        // First, unembed this cell from its parent cell if there is one.
        var parentCellId = this.get('parent');
        if (parentCellId) {

            var parentCell = this.collection && this.collection.get(parentCellId);
            parentCell.unembed(this);
        }

        _.invoke(this.getEmbeddedCells(), 'remove', opt);

        this.trigger('remove', this, this.collection, opt);

        if (collection) {
            collection.trigger('batch:stop', { batchName: 'remove' });
        }

        return this;
    },

    toFront: function(opt) {

        if (this.collection) {

            opt = opt || {};

            var z = (this.collection.last().get('z') || 0) + 1;

            this.trigger('batch:start', { batchName: 'to-front' }).set('z', z, opt);

            if (opt.deep) {

                var cells = this.getEmbeddedCells({ deep: true, breadthFirst: true });
                _.each(cells, function(cell) { cell.set('z', ++z, opt); });

            }

            this.trigger('batch:stop', { batchName: 'to-front' });
        }

        return this;
    },

    toBack: function(opt) {

        if (this.collection) {

            opt = opt || {};

            var z = (this.collection.first().get('z') || 0) - 1;

            this.trigger('batch:start', { batchName: 'to-back' });

            if (opt.deep) {

                var cells = this.getEmbeddedCells({ deep: true, breadthFirst: true });
                _.eachRight(cells, function(cell) { cell.set('z', z--, opt); });
            }

            this.set('z', z, opt).trigger('batch:stop', { batchName: 'to-back' });
        }

        return this;
    },

    embed: function(cell, opt) {

        if (this == cell || this.isEmbeddedIn(cell)) {

            throw new Error('Recursive embedding not allowed.');

        } else {

            this.trigger('batch:start', { batchName: 'embed' });

            var embeds = _.clone(this.get('embeds') || []);

            // We keep all element ids after links ids.
            embeds[cell.isLink() ? 'unshift' : 'push'](cell.id);

            cell.set('parent', this.id, opt);
            this.set('embeds', _.uniq(embeds), opt);

            this.trigger('batch:stop', { batchName: 'embed' });
        }

        return this;
    },

    unembed: function(cell, opt) {

        this.trigger('batch:start', { batchName: 'unembed' });

        cell.unset('parent', opt);
        this.set('embeds', _.without(this.get('embeds'), cell.id), opt);

        this.trigger('batch:stop', { batchName: 'unembed' });

        return this;
    },

    // Return an array of ancestor cells.
    // The array is ordered from the parent of the cell
    // to the most distant ancestor.
    getAncestors: function() {

        var ancestors = [];
        var parentId = this.get('parent');

        if (this.collection === undefined)
            return ancestors;

        while (parentId !== undefined) {
            var parent = this.collection.get(parentId);
            if (parent !== undefined) {
                ancestors.push(parent);
                parentId = parent.get('parent');
            } else {
                break;
            }
        }

        return ancestors;
    },

    getEmbeddedCells: function(opt) {

        opt = opt || {};

        // Cell models can only be retrieved when this element is part of a collection.
        // There is no way this element knows about other cells otherwise.
        // This also means that calling e.g. `translate()` on an element with embeds before
        // adding it to a graph does not translate its embeds.
        if (this.collection) {

            var cells;

            if (opt.deep) {

                if (opt.breadthFirst) {

                    // breadthFirst algorithm
                    cells = [];
                    var queue = this.getEmbeddedCells();

                    while (queue.length > 0) {

                        var parent = queue.shift();
                        cells.push(parent);
                        queue.push.apply(queue, parent.getEmbeddedCells());
                    }

                } else {

                    // depthFirst algorithm
                    cells = this.getEmbeddedCells();
                    _.each(cells, function(cell) {
                        cells.push.apply(cells, cell.getEmbeddedCells(opt));
                    });
                }

            } else {

                cells = _.map(this.get('embeds'), this.collection.get, this.collection);
            }

            return cells;
        }
        return [];
    },

    isEmbeddedIn: function(cell, opt) {

        var cellId = _.isString(cell) ? cell : cell.id;
        var parentId = this.get('parent');

        opt = _.defaults({ deep: true }, opt);

        // See getEmbeddedCells().
        if (this.collection && opt.deep) {

            while (parentId) {
                if (parentId == cellId) {
                    return true;
                }
                parentId = this.collection.get(parentId).get('parent');
            }

            return false;

        } else {

            // When this cell is not part of a collection check
            // at least whether it's a direct child of given cell.
            return parentId == cellId;
        }
    },

    clone: function(opt) {

        opt = opt || {};

        var clone = Backbone.Model.prototype.clone.apply(this, arguments);

        // We don't want the clone to have the same ID as the original.
        clone.set('id', joint.util.uuid(), { silent: true });
        clone.set('embeds', '');

        if (!opt.deep) return clone;

        // The rest of the `clone()` method deals with embeds. If `deep` option is set to `true`,
        // the return value is an array of all the embedded clones created.

        var embeds = _.sortBy(this.getEmbeddedCells(), function(cell) {
            // Sort embeds that links come before elements.
            return cell instanceof joint.dia.Element;
        });

        var clones = [clone];

        // This mapping stores cloned links under the `id`s of they originals.
        // This prevents cloning a link more then once. Consider a link 'self loop' for example.
        var linkCloneMapping = {};

        _.each(embeds, function(embed) {

            var embedClones = embed.clone({ deep: true });

            // Embed the first clone returned from `clone({ deep: true })` above. The first
            // cell is always the clone of the cell that called the `clone()` method, i.e. clone of `embed` in this case.
            clone.embed(embedClones[0]);

            _.each(embedClones, function(embedClone) {

                if (embedClone instanceof joint.dia.Link) {

                    if (embedClone.get('source').id == this.id) {

                        embedClone.prop('source', { id: clone.id });
                    }

                    if (embedClone.get('target').id == this.id) {

                        embedClone.prop('target', { id: clone.id });
                    }

                    linkCloneMapping[embed.id] = embedClone;

                    // Skip links. Inbound/outbound links are not relevant for them.
                    return;
                }

                clones.push(embedClone);

                // Collect all inbound links, clone them (if not done already) and set their target to the `embedClone.id`.
                var inboundLinks = this.collection.getConnectedLinks(embed, { inbound: true });

                _.each(inboundLinks, function(link) {

                    var linkClone = linkCloneMapping[link.id] || link.clone();

                    // Make sure we don't clone a link more then once.
                    linkCloneMapping[link.id] = linkClone;

                    linkClone.prop('target', { id: embedClone.id });
                });

                // Collect all inbound links, clone them (if not done already) and set their source to the `embedClone.id`.
                var outboundLinks = this.collection.getConnectedLinks(embed, { outbound: true });

                _.each(outboundLinks, function(link) {

                    var linkClone = linkCloneMapping[link.id] || link.clone();

                    // Make sure we don't clone a link more then once.
                    linkCloneMapping[link.id] = linkClone;

                    linkClone.prop('source', { id: embedClone.id });
                });

            }, this);

        }, this);

        // Add link clones to the array of all the new clones.
        clones = clones.concat(_.values(linkCloneMapping));

        return clones;
    },

    // A convenient way to set nested properties.
    // This method merges the properties you'd like to set with the ones
    // stored in the cell and makes sure change events are properly triggered.
    // You can either set a nested property with one object
    // or use a property path.
    // The most simple use case is:
    // `cell.prop('name/first', 'John')` or
    // `cell.prop({ name: { first: 'John' } })`.
    // Nested arrays are supported too:
    // `cell.prop('series/0/data/0/degree', 50)` or
    // `cell.prop({ series: [ { data: [ { degree: 50 } ] } ] })`.
    prop: function(props, value, opt) {

        var delim = '/';

        if (_.isString(props)) {
            // Get/set an attribute by a special path syntax that delimits
            // nested objects by the colon character.

            if (arguments.length > 1) {

                var path = props;
                var pathArray = path.split('/');
                var property = pathArray[0];

                opt = opt || {};
                opt.propertyPath = path;
                opt.propertyValue = value;

                if (pathArray.length == 1) {
                    // Property is not nested. We can simply use `set()`.
                    return this.set(property, value, opt);
                }

                var update = {};
                // Initialize the nested object. Subobjects are either arrays or objects.
                // An empty array is created if the sub-key is an integer. Otherwise, an empty object is created.
                // Note that this imposes a limitation on object keys one can use with Inspector.
                // Pure integer keys will cause issues and are therefore not allowed.
                var initializer = update;
                var prevProperty = property;
                _.each(_.rest(pathArray), function(key) {
                    initializer = initializer[prevProperty] = (_.isFinite(Number(key)) ? [] : {});
                    prevProperty = key;
                });
                // Fill update with the `value` on `path`.
                update = joint.util.setByPath(update, path, value, '/');

                var baseAttributes = _.merge({}, this.attributes);
                // if rewrite mode enabled, we replace value referenced by path with
                // the new one (we don't merge).
                opt.rewrite && joint.util.unsetByPath(baseAttributes, path, '/');

                // Merge update with the model attributes.
                var attributes = _.merge(baseAttributes, update);
                // Finally, set the property to the updated attributes.
                return this.set(property, attributes[property], opt);

            } else {

                return joint.util.getByPath(this.attributes, props, delim);
            }
        }

        return this.set(_.merge({}, this.attributes, props), value);
    },

    // A convient way to unset nested properties
    removeProp: function(path, opt) {

        // Once a property is removed from the `attrs` attribute
        // the cellView will recognize a `dirty` flag and rerender itself
        // in order to remove the attribute from SVG element.
        opt = opt || {};
        opt.dirty = true;

        var pathArray = path.split('/');

        if (pathArray.length === 1) {
            // A top level property
            return this.unset(path, opt);
        }

        // A nested property
        var property = pathArray[0];
        var nestedPath = pathArray.slice(1).join('/');
        var propertyValue = _.merge({}, this.get(property));

        joint.util.unsetByPath(propertyValue, nestedPath, '/');

        return this.set(property, propertyValue, opt);
    },

    // A convenient way to set nested attributes.
    attr: function(attrs, value, opt) {

        var args = Array.prototype.slice.call(arguments);

        if (_.isString(attrs)) {
            // Get/set an attribute by a special path syntax that delimits
            // nested objects by the colon character.
            args[0] = 'attrs/' + attrs;

        } else {

            args[0] = { 'attrs' : attrs };
        }

        return this.prop.apply(this, args);
    },

    // A convenient way to unset nested attributes
    removeAttr: function(path, opt) {

        if (_.isArray(path)) {
            _.each(path, function(p) { this.removeAttr(p, opt); }, this);
            return this;
        }

        return this.removeProp('attrs/' + path, opt);
    },

    transition: function(path, value, opt, delim) {

        delim = delim || '/';

        var defaults = {
            duration: 100,
            delay: 10,
            timingFunction: joint.util.timing.linear,
            valueFunction: joint.util.interpolate.number
        };

        opt = _.extend(defaults, opt);

        var firstFrameTime = 0;
        var interpolatingFunction;

        var setter = _.bind(function(runtime) {

            var id, progress, propertyValue, status;

            firstFrameTime = firstFrameTime || runtime;
            runtime -= firstFrameTime;
            progress = runtime / opt.duration;

            if (progress < 1) {
                this._transitionIds[path] = id = joint.util.nextFrame(setter);
            } else {
                progress = 1;
                delete this._transitionIds[path];
            }

            propertyValue = interpolatingFunction(opt.timingFunction(progress));

            opt.transitionId = id;

            this.prop(path, propertyValue, opt);

            if (!id) this.trigger('transition:end', this, path);

        }, this);

        var initiator = _.bind(function(callback) {

            this.stopTransitions(path);

            interpolatingFunction = opt.valueFunction(joint.util.getByPath(this.attributes, path, delim), value);

            this._transitionIds[path] = joint.util.nextFrame(callback);

            this.trigger('transition:start', this, path);

        }, this);

        return _.delay(initiator, opt.delay, setter);
    },

    getTransitions: function() {
        return _.keys(this._transitionIds);
    },

    stopTransitions: function(path, delim) {

        delim = delim || '/';

        var pathArray = path && path.split(delim);

        _(this._transitionIds).keys().filter(pathArray && function(key) {

            return _.isEqual(pathArray, key.split(delim).slice(0, pathArray.length));

        }).each(function(key) {

            joint.util.cancelFrame(this._transitionIds[key]);

            delete this._transitionIds[key];

            this.trigger('transition:end', this, key);

        }, this);

        return this;
    },

    // A shorcut making it easy to create constructs like the following:
    // `var el = (new joint.shapes.basic.Rect).addTo(graph)`.
    addTo: function(graph, opt) {

        graph.addCell(this, opt);
        return this;
    },

    // A shortcut for an equivalent call: `paper.findViewByModel(cell)`
    // making it easy to create constructs like the following:
    // `cell.findView(paper).highlight()`
    findView: function(paper) {

        return paper.findViewByModel(this);
    },

    isLink: function() {

        return false;
    }
});

// joint.dia.CellView base view and controller.
// --------------------------------------------

// This is the base view and controller for `joint.dia.ElementView` and `joint.dia.LinkView`.

joint.dia.CellView = Backbone.View.extend({

    tagName: 'g',

    attributes: function() {

        return { 'model-id': this.model.id };
    },

    constructor: function(options) {

        this._configure(options);
        Backbone.View.apply(this, arguments);
    },

    _configure: function(options) {

        if (this.options) options = _.extend({}, _.result(this, 'options'), options);
        this.options = options;
        // Make sure a global unique id is assigned to this view. Store this id also to the properties object.
        // The global unique id makes sure that the same view can be rendered on e.g. different machines and
        // still be associated to the same object among all those clients. This is necessary for real-time
        // collaboration mechanism.
        this.options.id = this.options.id || joint.util.guid(this);
    },

    initialize: function() {

        _.bindAll(this, 'remove', 'update');

        // Store reference to this to the <g> DOM element so that the view is accessible through the DOM tree.
        this.$el.data('view', this);

        this.listenTo(this.model, 'remove', this.remove);
        this.listenTo(this.model, 'change:attrs', this.onChangeAttrs);
    },

    onChangeAttrs: function(cell, attrs, opt) {

        if (opt.dirty) {

            // dirty flag could be set when a model attribute was removed and it needs to be cleared
            // also from the DOM element. See cell.removeAttr().
            return this.render();
        }

        return this.update();
    },

    // Override the Backbone `_ensureElement()` method in order to create a `<g>` node that wraps
    // all the nodes of the Cell view.
    _ensureElement: function() {

        var el;

        if (!this.el) {

            var attrs = _.extend({ id: this.id }, _.result(this, 'attributes'));
            if (this.className) attrs['class'] = _.result(this, 'className');
            el = V(_.result(this, 'tagName'), attrs).node;

        } else {

            el = _.result(this, 'el');
        }

        this.setElement(el, false);
    },

    // Utilize an alternative DOM manipulation API by
    // adding an element reference wrapped in Vectorizer.
    _setElement: function(el) {
        this.$el = el instanceof Backbone.$ ? el : Backbone.$(el);
        this.el = this.$el[0];
        this.vel = V(this.el);
    },

    findBySelector: function(selector) {

        // These are either descendants of `this.$el` of `this.$el` itself.
        // `.` is a special selector used to select the wrapping `<g>` element.
        var $selected = selector === '.' ? this.$el : this.$el.find(selector);
        return $selected;
    },

    notify: function(evt) {

        if (this.paper) {

            var args = Array.prototype.slice.call(arguments, 1);

            // Trigger the event on both the element itself and also on the paper.
            this.trigger.apply(this, [evt].concat(args));

            // Paper event handlers receive the view object as the first argument.
            this.paper.trigger.apply(this.paper, [evt, this].concat(args));
        }
    },

    getStrokeBBox: function(el) {
        // Return a bounding box rectangle that takes into account stroke.
        // Note that this is a naive and ad-hoc implementation that does not
        // works only in certain cases and should be replaced as soon as browsers will
        // start supporting the getStrokeBBox() SVG method.
        // @TODO any better solution is very welcome!

        var isMagnet = !!el;

        el = el || this.el;
        var bbox = V(el).bbox(false, this.paper.viewport);

        var strokeWidth;
        if (isMagnet) {

            strokeWidth = V(el).attr('stroke-width');

        } else {

            strokeWidth = this.model.attr('rect/stroke-width') || this.model.attr('circle/stroke-width') || this.model.attr('ellipse/stroke-width') || this.model.attr('path/stroke-width');
        }

        strokeWidth = parseFloat(strokeWidth) || 0;

        return g.rect(bbox).moveAndExpand({ x: -strokeWidth / 2, y: -strokeWidth / 2, width: strokeWidth, height: strokeWidth });
    },

    getBBox: function() {

        return g.rect(this.vel.bbox());
    },

    highlight: function(el, opt) {

        el = !el ? this.el : this.$(el)[0] || this.el;

        // set partial flag if the highlighted element is not the entire view.
        opt = opt || {};
        opt.partial = el != this.el;

        this.notify('cell:highlight', el, opt);
        return this;
    },

    unhighlight: function(el, opt) {

        el = !el ? this.el : this.$(el)[0] || this.el;

        opt = opt || {};
        opt.partial = el != this.el;

        this.notify('cell:unhighlight', el, opt);
        return this;
    },

    // Find the closest element that has the `magnet` attribute set to `true`. If there was not such
    // an element found, return the root element of the cell view.
    findMagnet: function(el) {

        var $el = this.$(el);

        if ($el.length === 0 || $el[0] === this.el) {

            // If the overall cell has set `magnet === false`, then return `undefined` to
            // announce there is no magnet found for this cell.
            // This is especially useful to set on cells that have 'ports'. In this case,
            // only the ports have set `magnet === true` and the overall element has `magnet === false`.
            var attrs = this.model.get('attrs') || {};
            if (attrs['.'] && attrs['.']['magnet'] === false) {
                return undefined;
            }

            return this.el;
        }

        if ($el.attr('magnet')) {

            return $el[0];
        }

        return this.findMagnet($el.parent());
    },

    // `selector` is a CSS selector or `'.'`. `filter` must be in the special JointJS filter format:
    // `{ name: <name of the filter>, args: { <arguments>, ... }`.
    // An example is: `{ filter: { name: 'blur', args: { radius: 5 } } }`.
    applyFilter: function(selector, filter) {

        var $selected = _.isString(selector) ? this.findBySelector(selector) : $(selector);

        // Generate a hash code from the stringified filter definition. This gives us
        // a unique filter ID for different definitions.
        var filterId = filter.name + this.paper.svg.id + joint.util.hashCode(JSON.stringify(filter));

        // If the filter already exists in the document,
        // we're done and we can just use it (reference it using `url()`).
        // If not, create one.
        if (!this.paper.svg.getElementById(filterId)) {

            var filterSVGString = joint.util.filter[filter.name] && joint.util.filter[filter.name](filter.args || {});
            if (!filterSVGString) {
                throw new Error('Non-existing filter ' + filter.name);
            }
            var filterElement = V(filterSVGString);
            // Set the filter area to be 3x the bounding box of the cell
            // and center the filter around the cell.
            filterElement.attr({
                filterUnits: 'objectBoundingBox',
                x: -1, y: -1, width: 3, height: 3
            });
            if (filter.attrs) filterElement.attr(filter.attrs);
            filterElement.node.id = filterId;
            V(this.paper.svg).defs().append(filterElement);
        }

        $selected.each(function() {

            V(this).attr('filter', 'url(#' + filterId + ')');
        });
    },

    // `selector` is a CSS selector or `'.'`. `attr` is either a `'fill'` or `'stroke'`.
    // `gradient` must be in the special JointJS gradient format:
    // `{ type: <linearGradient|radialGradient>, stops: [ { offset: <offset>, color: <color> }, ... ]`.
    // An example is: `{ fill: { type: 'linearGradient', stops: [ { offset: '10%', color: 'green' }, { offset: '50%', color: 'blue' } ] } }`.
    applyGradient: function(selector, attr, gradient) {

        var $selected = _.isString(selector) ? this.findBySelector(selector) : $(selector);

        // Generate a hash code from the stringified filter definition. This gives us
        // a unique filter ID for different definitions.
        var gradientId = gradient.type + this.paper.svg.id + joint.util.hashCode(JSON.stringify(gradient));

        // If the gradient already exists in the document,
        // we're done and we can just use it (reference it using `url()`).
        // If not, create one.
        if (!this.paper.svg.getElementById(gradientId)) {

            var gradientSVGString = [
                '<' + gradient.type + '>',
                _.map(gradient.stops, function(stop) {
                    return '<stop offset="' + stop.offset + '" stop-color="' + stop.color + '" stop-opacity="' + (_.isFinite(stop.opacity) ? stop.opacity : 1) + '" />';
                }).join(''),
                '</' + gradient.type + '>'
            ].join('');

            var gradientElement = V(gradientSVGString);
            if (gradient.attrs) { gradientElement.attr(gradient.attrs); }
            gradientElement.node.id = gradientId;
            V(this.paper.svg).defs().append(gradientElement);
        }

        $selected.each(function() {

            V(this).attr(attr, 'url(#' + gradientId + ')');
        });
    },

    // Construct a unique selector for the `el` element within this view.
    // `prevSelector` is being collected through the recursive call.
    // No value for `prevSelector` is expected when using this method.
    getSelector: function(el, prevSelector) {

        if (el === this.el) {
            return prevSelector;
        }

        var nthChild = V(el).index() + 1;
        var selector = el.tagName + ':nth-child(' + nthChild + ')';

        if (prevSelector) {
            selector += ' > ' + prevSelector;
        }

        return this.getSelector(el.parentNode, selector);
    },

    // Interaction. The controller part.
    // ---------------------------------

    // Interaction is handled by the paper and delegated to the view in interest.
    // `x` & `y` parameters passed to these functions represent the coordinates already snapped to the paper grid.
    // If necessary, real coordinates can be obtained from the `evt` event object.

    // These functions are supposed to be overriden by the views that inherit from `joint.dia.Cell`,
    // i.e. `joint.dia.Element` and `joint.dia.Link`.

    pointerdblclick: function(evt, x, y) {

        this.notify('cell:pointerdblclick', evt, x, y);
    },

    pointerclick: function(evt, x, y) {

        this.notify('cell:pointerclick', evt, x, y);
    },

    pointerdown: function(evt, x, y) {

        if (this.model.collection) {
            this.model.trigger('batch:start', { batchName: 'pointer' });
            this._collection = this.model.collection;
        }

        this.notify('cell:pointerdown', evt, x, y);
    },

    pointermove: function(evt, x, y) {

        this.notify('cell:pointermove', evt, x, y);
    },

    pointerup: function(evt, x, y) {

        this.notify('cell:pointerup', evt, x, y);

        if (this._collection) {
            // we don't want to trigger event on model as model doesn't
            // need to be member of collection anymore (remove)
            this._collection.trigger('batch:stop', { batchName: 'pointer' });
            delete this._collection;
        }
    },

    mouseover: function(evt) {

        this.notify('cell:mouseover', evt);
    },

    mouseout: function(evt) {

        this.notify('cell:mouseout', evt);
    },

    contextmenu: function(evt, x, y) {

        this.notify('cell:contextmenu', evt, x, y);
    }
});

//      JointJS library.
//      (c) 2011-2013 client IO

// joint.dia.Element base model.
// -----------------------------

joint.dia.Element = joint.dia.Cell.extend({

    defaults: {
        position: { x: 0, y: 0 },
        size: { width: 1, height: 1 },
        angle: 0
    },

    position: function(x, y, opt) {

        var isSetter = _.isNumber(y);

        opt = (isSetter ? opt : x) || {};

        // option `parentRelative` for setting the position relative to the element's parent.
        if (opt.parentRelative) {

            // Getting the parent's position requires the collection.
            // Cell.get('parent') helds cell id only.
            if (!this.collection) throw new Error('Element must be part of a collection.');

            var parent = this.collection.get(this.get('parent'));
            var parentPosition = parent && !parent.isLink()
                ? parent.get('position')
                : { x: 0, y: 0 };
        }

        if (isSetter) {

            if (opt.parentRelative) {
                x += parentPosition.x;
                y += parentPosition.y;
            }

            return this.set('position', { x: x, y: y }, opt);

        } else { // Getter returns a geometry point.

            var elementPosition = g.point(this.get('position'));

            return opt.parentRelative
                ? elementPosition.difference(parentPosition)
                : elementPosition;
        }
    },

    translate: function(tx, ty, opt) {

        ty = ty || 0;

        if (tx === 0 && ty === 0) {
            // Like nothing has happened.
            return this;
        }

        opt = opt || {};
        // Pass the initiator of the translation.
        opt.translateBy = opt.translateBy || this.id;
        // To find out by how much an element was translated in event 'change:position' handlers.
        opt.tx = tx;
        opt.ty = ty;

        var position = this.get('position') || { x: 0, y: 0 };
        var translatedPosition = { x: position.x + tx || 0, y: position.y + ty || 0 };

        if (opt.transition) {

            if (!_.isObject(opt.transition)) opt.transition = {};

            this.transition('position', translatedPosition, _.extend({}, opt.transition, {
                valueFunction: joint.util.interpolate.object
            }));

        } else {

            this.set('position', translatedPosition, opt);

            // Recursively call `translate()` on all the embeds cells.
            _.invoke(this.getEmbeddedCells(), 'translate', tx, ty, opt);
        }

        return this;
    },

    resize: function(width, height, opt) {

        this.trigger('batch:start', { batchName: 'resize' });
        this.set('size', { width: width, height: height }, opt);
        this.trigger('batch:stop', { batchName: 'resize' });

        return this;
    },

    fitEmbeds: function(opt) {

        opt = opt || 0;

        var collection = this.collection;

        // Getting the children's size and position requires the collection.
        // Cell.get('embdes') helds an array of cell ids only.
        if (!collection) throw new Error('Element must be part of a collection.');

        var embeddedCells = this.getEmbeddedCells();

        if (embeddedCells.length > 0) {

            this.trigger('batch:start', { batchName: 'fit-embeds' });

            if (opt.deep) {
                // Recursively apply fitEmbeds on all embeds first.
                _.invoke(embeddedCells, 'fitEmbeds', opt);
            }

            // Compute cell's size and position  based on the children bbox
            // and given padding.
            var bbox = collection.getBBox(embeddedCells);
            var padding = joint.util.normalizeSides(opt.padding);

            // Apply padding computed above to the bbox.
            bbox.moveAndExpand({
                x: - padding.left,
                y: - padding.top,
                width: padding.right + padding.left,
                height: padding.bottom + padding.top
            });

            // Set new element dimensions finally.
            this.set({
                position: { x: bbox.x, y: bbox.y },
                size: { width: bbox.width, height: bbox.height }
            }, opt);

            this.trigger('batch:stop', { batchName: 'fit-embeds' });
        }

        return this;
    },

    // Rotate element by `angle` degrees, optionally around `origin` point.
    // If `origin` is not provided, it is considered to be the center of the element.
    // If `absolute` is `true`, the `angle` is considered is abslute, i.e. it is not
    // the difference from the previous angle.
    rotate: function(angle, absolute, origin) {

        if (origin) {

            var center = this.getBBox().center();
            var size = this.get('size');
            var position = this.get('position');
            center.rotate(origin, this.get('angle') - angle);
            var dx = center.x - size.width / 2 - position.x;
            var dy = center.y - size.height / 2 - position.y;
            this.trigger('batch:start', { batchName: 'rotate' });
            this.translate(dx, dy);
            this.rotate(angle, absolute);
            this.trigger('batch:stop', { batchName: 'rotate' });

        } else {

            this.set('angle', absolute ? angle : (this.get('angle') + angle) % 360);
        }

        return this;
    },

    getBBox: function() {

        var position = this.get('position');
        var size = this.get('size');

        return g.rect(position.x, position.y, size.width, size.height);
    }
});

// joint.dia.Element base view and controller.
// -------------------------------------------

joint.dia.ElementView = joint.dia.CellView.extend({

    SPECIAL_ATTRIBUTES: [
        'style',
        'text',
        'html',
        'ref-x',
        'ref-y',
        'ref-dx',
        'ref-dy',
        'ref-width',
        'ref-height',
        'ref',
        'x-alignment',
        'y-alignment',
        'port'
    ],

    className: function() {
        return 'element ' + this.model.get('type').replace('.', ' ', 'g');
    },

    initialize: function() {

        _.bindAll(this, 'translate', 'resize', 'rotate');

        joint.dia.CellView.prototype.initialize.apply(this, arguments);

        this.listenTo(this.model, 'change:position', this.translate);
        this.listenTo(this.model, 'change:size', this.resize);
        this.listenTo(this.model, 'change:angle', this.rotate);
    },

    // Default is to process the `attrs` object and set attributes on subelements based on the selectors.
    update: function(cell, renderingOnlyAttrs) {

        var allAttrs = this.model.get('attrs');

        var rotatable = this.rotatableNode;
        if (rotatable) {
            var rotation = rotatable.attr('transform');
            rotatable.attr('transform', '');
        }

        var relativelyPositioned = [];
        var nodesBySelector = {};

        _.each(renderingOnlyAttrs || allAttrs, function(attrs, selector) {

            // Elements that should be updated.
            var $selected = this.findBySelector(selector);
            // No element matched by the `selector` was found. We're done then.
            if ($selected.length === 0) return;

            nodesBySelector[selector] = $selected;

            // Special attributes are treated by JointJS, not by SVG.
            var specialAttributes = this.SPECIAL_ATTRIBUTES.slice();

            // If the `filter` attribute is an object, it is in the special JointJS filter format and so
            // it becomes a special attribute and is treated separately.
            if (_.isObject(attrs.filter)) {

                specialAttributes.push('filter');
                this.applyFilter($selected, attrs.filter);
            }

            // If the `fill` or `stroke` attribute is an object, it is in the special JointJS gradient format and so
            // it becomes a special attribute and is treated separately.
            if (_.isObject(attrs.fill)) {

                specialAttributes.push('fill');
                this.applyGradient($selected, 'fill', attrs.fill);
            }
            if (_.isObject(attrs.stroke)) {

                specialAttributes.push('stroke');
                this.applyGradient($selected, 'stroke', attrs.stroke);
            }

            // Make special case for `text` attribute. So that we can set text content of the `<text>` element
            // via the `attrs` object as well.
            // Note that it's important to set text before applying the rest of the final attributes.
            // Vectorizer `text()` method sets on the element its own attributes and it has to be possible
            // to rewrite them, if needed. (i.e display: 'none')
            if (!_.isUndefined(attrs.text)) {

                $selected.each(function() {

                    V(this).text(attrs.text + '', { lineHeight: attrs.lineHeight, textPath: attrs.textPath, annotations: attrs.annotations });
                });
                specialAttributes.push('lineHeight', 'textPath', 'annotations');
            }

            // Set regular attributes on the `$selected` subelement. Note that we cannot use the jQuery attr()
            // method as some of the attributes might be namespaced (e.g. xlink:href) which fails with jQuery attr().
            var finalAttributes = _.omit(attrs, specialAttributes);

            $selected.each(function() {

                V(this).attr(finalAttributes);
            });

            // `port` attribute contains the `id` of the port that the underlying magnet represents.
            if (attrs.port) {

                $selected.attr('port', _.isUndefined(attrs.port.id) ? attrs.port : attrs.port.id);
            }

            // `style` attribute is special in the sense that it sets the CSS style of the subelement.
            if (attrs.style) {

                $selected.css(attrs.style);
            }

            if (!_.isUndefined(attrs.html)) {

                $selected.each(function() {

                    $(this).html(attrs.html + '');
                });
            }

            // Special `ref-x` and `ref-y` attributes make it possible to set both absolute or
            // relative positioning of subelements.
            if (!_.isUndefined(attrs['ref-x']) ||
                !_.isUndefined(attrs['ref-y']) ||
                !_.isUndefined(attrs['ref-dx']) ||
                !_.isUndefined(attrs['ref-dy']) ||
		!_.isUndefined(attrs['x-alignment']) ||
		!_.isUndefined(attrs['y-alignment']) ||
                !_.isUndefined(attrs['ref-width']) ||
                !_.isUndefined(attrs['ref-height'])
               ) {

                _.each($selected, function(el, index, list) {
                    var $el = $(el);
                    // copy original list selector to the element
                    $el.selector = list.selector;
                    relativelyPositioned.push($el);
                });
            }

        }, this);

        // We don't want the sub elements to affect the bounding box of the root element when
        // positioning the sub elements relatively to the bounding box.
        //_.invoke(relativelyPositioned, 'hide');
        //_.invoke(relativelyPositioned, 'show');

        // Note that we're using the bounding box without transformation because we are already inside
        // a transformed coordinate system.
        var size = this.model.get('size');
        var bbox = { x: 0, y: 0, width: size.width, height: size.height };

        renderingOnlyAttrs = renderingOnlyAttrs || {};

        _.each(relativelyPositioned, function($el) {

            // if there was a special attribute affecting the position amongst renderingOnlyAttributes
            // we have to merge it with rest of the element's attributes as they are necessary
            // to update the position relatively (i.e `ref`)
            var renderingOnlyElAttrs = renderingOnlyAttrs[$el.selector];
            var elAttrs = renderingOnlyElAttrs
                ? _.merge({}, allAttrs[$el.selector], renderingOnlyElAttrs)
            : allAttrs[$el.selector];

            this.positionRelative(V($el[0]), bbox, elAttrs, nodesBySelector);

        }, this);

        if (rotatable) {

            rotatable.attr('transform', rotation || '');
        }
    },

    positionRelative: function(vel, bbox, attributes, nodesBySelector) {

        var ref = attributes['ref'];
        var refDx = parseFloat(attributes['ref-dx']);
        var refDy = parseFloat(attributes['ref-dy']);
        var yAlignment = attributes['y-alignment'];
        var xAlignment = attributes['x-alignment'];

        // 'ref-y', 'ref-x', 'ref-width', 'ref-height' can be defined
        // by value or by percentage e.g 4, 0.5, '200%'.
        var refY = attributes['ref-y'];
        var refYPercentage = _.isString(refY) && refY.slice(-1) === '%';
        refY = parseFloat(refY);
        if (refYPercentage) {
            refY /= 100;
        }

        var refX = attributes['ref-x'];
        var refXPercentage = _.isString(refX) && refX.slice(-1) === '%';
        refX = parseFloat(refX);
        if (refXPercentage) {
            refX /= 100;
        }

        var refWidth = attributes['ref-width'];
        var refWidthPercentage = _.isString(refWidth) && refWidth.slice(-1) === '%';
        refWidth = parseFloat(refWidth);
        if (refWidthPercentage) {
            refWidth /= 100;
        }

        var refHeight = attributes['ref-height'];
        var refHeightPercentage = _.isString(refHeight) && refHeight.slice(-1) === '%';
        refHeight = parseFloat(refHeight);
        if (refHeightPercentage) {
            refHeight /= 100;
        }

        // Check if the node is a descendant of the scalable group.
        var scalable = vel.findParentByClass('scalable', this.el);

        // `ref` is the selector of the reference element. If no `ref` is passed, reference
        // element is the root element.
        if (ref) {

            var vref;

            if (nodesBySelector && nodesBySelector[ref]) {
                // First we check if the same selector has been already used.
                vref = V(nodesBySelector[ref][0]);
            } else {
                // Other wise we find the ref ourselves.
                vref = ref === '.' ? this.vel : this.vel.findOne(ref);
            }

            if (!vref) {
                throw new Error('dia.ElementView: reference does not exists.');
            }

            // Get the bounding box of the reference element relative to the root `<g>` element.
            bbox = vref.bbox(false, this.el);
        }

        // Remove the previous translate() from the transform attribute and translate the element
        // relative to the root bounding box following the `ref-x` and `ref-y` attributes.
        if (vel.attr('transform')) {

            vel.attr('transform', vel.attr('transform').replace(/translate\([^)]*\)/g, '').trim() || '');
        }

        // 'ref-width'/'ref-height' defines the width/height of the subelement relatively to
        // the reference element size
        // val in 0..1         ref-width = 0.75 sets the width to 75% of the ref. el. width
        // val < 0 || val > 1  ref-height = -20 sets the height to the the ref. el. height shorter by 20

        if (isFinite(refWidth)) {

            if (refWidthPercentage || refWidth >= 0 && refWidth <= 1) {

                vel.attr('width', refWidth * bbox.width);

            } else {

                vel.attr('width', Math.max(refWidth + bbox.width, 0));
            }
        }

        if (isFinite(refHeight)) {

            if (refHeightPercentage || refHeight >= 0 && refHeight <= 1) {

                vel.attr('height', refHeight * bbox.height);

            } else {

                vel.attr('height', Math.max(refHeight + bbox.height, 0));
            }
        }

        // The final translation of the subelement.
        var tx = 0;
        var ty = 0;
        var scale;

        // `ref-dx` and `ref-dy` define the offset of the subelement relative to the right and/or bottom
        // coordinate of the reference element.
        if (isFinite(refDx)) {

            if (scalable) {

                // Compensate for the scale grid in case the elemnt is in the scalable group.
                scale = scale || scalable.scale();
                tx = bbox.x + bbox.width + refDx / scale.sx;

            } else {

                tx = bbox.x + bbox.width + refDx;
            }
        }
        if (isFinite(refDy)) {

            if (scalable) {

                // Compensate for the scale grid in case the elemnt is in the scalable group.
                scale = scale || scalable.scale();
                ty = bbox.y + bbox.height + refDy / scale.sy;
            } else {

                ty = bbox.y + bbox.height + refDy;
            }
        }

        // if `refX` is in [0, 1] then `refX` is a fraction of bounding box width
        // if `refX` is < 0 then `refX`'s absolute values is the right coordinate of the bounding box
        // otherwise, `refX` is the left coordinate of the bounding box
        // Analogical rules apply for `refY`.
        if (isFinite(refX)) {

            if (refXPercentage || refX > 0 && refX < 1) {

                tx = bbox.x + bbox.width * refX;

            } else if (scalable) {

                // Compensate for the scale grid in case the elemnt is in the scalable group.
                scale = scale || scalable.scale();
                tx = bbox.x + refX / scale.sx;

            } else {

                tx = bbox.x + refX;
            }
        }
        if (isFinite(refY)) {

            if (refXPercentage || refY > 0 && refY < 1) {

                ty = bbox.y + bbox.height * refY;

            } else if (scalable) {

                // Compensate for the scale grid in case the elemnt is in the scalable group.
                scale = scale || scalable.scale();
                ty = bbox.y + refY / scale.sy;

            } else {

                ty = bbox.y + refY;
            }
        }

        if (!_.isUndefined(yAlignment) || !_.isUndefined(xAlignment)) {

            var velBBox = vel.bbox(false, this.paper.viewport);

            // `y-alignment` when set to `middle` causes centering of the subelement around its new y coordinate.
            if (yAlignment === 'middle') {

                ty -= velBBox.height / 2;

            } else if (isFinite(yAlignment)) {

                ty += (yAlignment > -1 && yAlignment < 1) ?  velBBox.height * yAlignment : yAlignment;
            }

            // `x-alignment` when set to `middle` causes centering of the subelement around its new x coordinate.
            if (xAlignment === 'middle') {

                tx -= velBBox.width / 2;

            } else if (isFinite(xAlignment)) {

                tx += (xAlignment > -1 && xAlignment < 1) ?  velBBox.width * xAlignment : xAlignment;
            }
        }

        vel.translate(tx, ty);
    },

    // `prototype.markup` is rendered by default. Set the `markup` attribute on the model if the
    // default markup is not desirable.
    renderMarkup: function() {

        var markup = this.model.markup || this.model.get('markup');

        if (markup) {

            var nodes = V(markup);

            this.vel.append(nodes);

        } else {

            throw new Error('properties.markup is missing while the default render() implementation is used.');
        }
    },

    render: function() {

        this.$el.empty();

        this.renderMarkup();

        this.rotatableNode = this.vel.findOne('.rotatable');
        this.scalableNode = this.vel.findOne('.scalable');

        this.update();

        this.resize();
        this.rotate();
        this.translate();

        return this;
    },

    // Scale the whole `<g>` group. Note the difference between `scale()` and `resize()` here.
    // `resize()` doesn't scale the whole `<g>` group but rather adjusts the `box.sx`/`box.sy` only.
    // `update()` is then responsible for scaling only those elements that have the `follow-scale`
    // attribute set to `true`. This is desirable in elements that have e.g. a `<text>` subelement
    // that is not supposed to be scaled together with a surrounding `<rect>` element that IS supposed
    // be be scaled.
    scale: function(sx, sy) {

        // TODO: take into account the origin coordinates `ox` and `oy`.
        this.vel.scale(sx, sy);
    },

    resize: function() {

        var size = this.model.get('size') || { width: 1, height: 1 };
        var angle = this.model.get('angle') || 0;

        var scalable = this.scalableNode;
        if (!scalable) {
            // If there is no scalable elements, than there is nothing to resize.
            return;
        }
        var scalableBbox = scalable.bbox(true);
        // Make sure `scalableBbox.width` and `scalableBbox.height` are not zero which can happen if the element does not have any content. By making
        // the width/height 1, we prevent HTML errors of the type `scale(Infinity, Infinity)`.
        scalable.attr('transform', 'scale(' + (size.width / (scalableBbox.width || 1)) + ',' + (size.height / (scalableBbox.height || 1)) + ')');

        // Now the interesting part. The goal is to be able to store the object geometry via just `x`, `y`, `angle`, `width` and `height`
        // Order of transformations is significant but we want to reconstruct the object always in the order:
        // resize(), rotate(), translate() no matter of how the object was transformed. For that to work,
        // we must adjust the `x` and `y` coordinates of the object whenever we resize it (because the origin of the
        // rotation changes). The new `x` and `y` coordinates are computed by canceling the previous rotation
        // around the center of the resized object (which is a different origin then the origin of the previous rotation)
        // and getting the top-left corner of the resulting object. Then we clean up the rotation back to what it originally was.

        // Cancel the rotation but now around a different origin, which is the center of the scaled object.
        var rotatable = this.rotatableNode;
        var rotation = rotatable && rotatable.attr('transform');
        if (rotation && rotation !== 'null') {

            rotatable.attr('transform', rotation + ' rotate(' + (-angle) + ',' + (size.width / 2) + ',' + (size.height / 2) + ')');
            var rotatableBbox = scalable.bbox(false, this.paper.viewport);

            // Store new x, y and perform rotate() again against the new rotation origin.
            this.model.set('position', { x: rotatableBbox.x, y: rotatableBbox.y });
            this.rotate();
        }

        // Update must always be called on non-rotated element. Otherwise, relative positioning
        // would work with wrong (rotated) bounding boxes.
        this.update();
    },

    translate: function(model, changes, opt) {

        var position = this.model.get('position') || { x: 0, y: 0 };

        this.vel.attr('transform', 'translate(' + position.x + ',' + position.y + ')');
    },

    rotate: function() {

        var rotatable = this.rotatableNode;
        if (!rotatable) {
            // If there is no rotatable elements, then there is nothing to rotate.
            return;
        }

        var angle = this.model.get('angle') || 0;
        var size = this.model.get('size') || { width: 1, height: 1 };

        var ox = size.width / 2;
        var oy = size.height / 2;


        rotatable.attr('transform', 'rotate(' + angle + ',' + ox + ',' + oy + ')');
    },

    getBBox: function(opt) {

        if (opt && opt.useModelGeometry) {
            var noTransformationBBox = this.model.getBBox().bbox(this.model.get('angle'));
            var transformationMatrix = this.paper.viewport.getCTM();
            return g.rect(V.transformRect(noTransformationBBox, transformationMatrix));
        }

        return joint.dia.CellView.prototype.getBBox.apply(this, arguments);
    },

    // Embedding mode methods
    // ----------------------

    findParentsByKey: function(key) {

        var bbox = this.model.getBBox();

        return key == 'bbox'
            ? this.paper.model.findModelsInArea(bbox)
            : this.paper.model.findModelsFromPoint(bbox[key]());
    },

    prepareEmbedding: function() {

        // Bring the model to the front with all his embeds.
        this.model.toFront({ deep: true, ui: true });

        // Move to front also all the inbound and outbound links that are connected
        // to any of the element descendant. If we bring to front only embedded elements,
        // links connected to them would stay in the background.
        _.invoke(this.paper.model.getConnectedLinks(this.model, { deep: true }), 'toFront', { ui: true });

        // Before we start looking for suitable parent we remove the current one.
        var parentId = this.model.get('parent');
        parentId && this.paper.model.getCell(parentId).unembed(this.model, { ui: true });
    },

    processEmbedding: function(opt) {

        opt = opt || this.paper.options;

        var candidates = this.findParentsByKey(opt.findParentBy);

        // don't account element itself or any of its descendents
        candidates = _.reject(candidates, function(el) {
            return this.model.id == el.id || el.isEmbeddedIn(this.model);
        }, this);

        if (opt.frontParentOnly) {
            // pick the element with the highest `z` index
            candidates = candidates.slice(-1);
        }

        var newCandidateView = null;
        var prevCandidateView = this._candidateEmbedView;

        // iterate over all candidates starting from the last one (has the highest z-index).
        for (var i = candidates.length - 1; i >= 0; i--) {

            var candidate = candidates[i];

            if (prevCandidateView && prevCandidateView.model.id == candidate.id) {

                // candidate remains the same
                newCandidateView = prevCandidateView;
                break;

            } else {

                var view = candidate.findView(this.paper);
                if (opt.validateEmbedding.call(this.paper, this, view)) {

                    // flip to the new candidate
                    newCandidateView = view;
                    break;
                }
            }
        }

        if (newCandidateView && newCandidateView != prevCandidateView) {
            // A new candidate view found. Highlight the new one.
            prevCandidateView && prevCandidateView.unhighlight(null, { embedding: true });
            this._candidateEmbedView = newCandidateView.highlight(null, { embedding: true });
        }

        if (!newCandidateView && prevCandidateView) {
            // No candidate view found. Unhighlight the previous candidate.
            prevCandidateView.unhighlight(null, { embedding: true });
            delete this._candidateEmbedView;
        }
    },

    finalizeEmbedding: function() {

        var candidateView = this._candidateEmbedView;

        if (candidateView) {

            // We finished embedding. Candidate view is chosen to become the parent of the model.
            candidateView.model.embed(this.model, { ui: true });
            candidateView.unhighlight(null, { embedding: true });

            delete this._candidateEmbedView;
        }

        _.invoke(this.paper.model.getConnectedLinks(this.model, { deep: true }), 'reparent', { ui: true });
    },

    // Interaction. The controller part.
    // ---------------------------------

    pointerdown: function(evt, x, y) {

        // target is a valid magnet start linking
        if (evt.target.getAttribute('magnet') && this.paper.options.validateMagnet.call(this.paper, this, evt.target)) {

            this.model.trigger('batch:start', { batchName: 'add-link' });

            var link = this.paper.getDefaultLink(this, evt.target);
            link.set({
                source: {
                    id: this.model.id,
                    selector: this.getSelector(evt.target),
                    port: $(evt.target).attr('port')
                },
                target: { x: x, y: y }
            });

            this.paper.model.addCell(link);

            this._linkView = this.paper.findViewByModel(link);
            this._linkView.pointerdown(evt, x, y);
            this._linkView.startArrowheadMove('target');

        } else {
            this._dx = x;
            this._dy = y;

            joint.dia.CellView.prototype.pointerdown.apply(this, arguments);
            this.notify('element:pointerdown', evt, x, y);
        }
    },

    pointermove: function(evt, x, y) {

        if (this._linkView) {

            // let the linkview deal with this event
            this._linkView.pointermove(evt, x, y);

        } else {

            var grid = this.paper.options.gridSize;
            var interactive = _.isFunction(this.options.interactive)
                ? this.options.interactive(this, 'pointermove')
                : this.options.interactive;

            if (interactive !== false) {

                var position = this.model.get('position');

                // Make sure the new element's position always snaps to the current grid after
                // translate as the previous one could be calculated with a different grid size.
                this.model.translate(
		    g.snapToGrid(position.x, grid) - position.x + g.snapToGrid(x - this._dx, grid),
		    g.snapToGrid(position.y, grid) - position.y + g.snapToGrid(y - this._dy, grid)
	        );

                if (this.paper.options.embeddingMode) {

                    if (!this._inProcessOfEmbedding) {
                        // Prepare the element for embedding only if the pointer moves.
                        // We don't want to do unnecessary action with the element
                        // if an user only clicks/dblclicks on it.
                        this.prepareEmbedding();
                        this._inProcessOfEmbedding = true;
                    }

                    this.processEmbedding();
                }
            }

            this._dx = g.snapToGrid(x, grid);
            this._dy = g.snapToGrid(y, grid);


            joint.dia.CellView.prototype.pointermove.apply(this, arguments);
            this.notify('element:pointermove', evt, x, y);
        }
    },

    pointerup: function(evt, x, y) {

        if (this._linkView) {

            // let the linkview deal with this event
            this._linkView.pointerup(evt, x, y);
            delete this._linkView;

            this.model.trigger('batch:stop', { batchName: 'add-link' });

        } else {

            if (this._inProcessOfEmbedding) {
                this.finalizeEmbedding();
                this._inProcessOfEmbedding = false;
            }

            this.notify('element:pointerup', evt, x, y);
            joint.dia.CellView.prototype.pointerup.apply(this, arguments);

        }
    }

});

//      JointJS diagramming library.
//      (c) 2011-2013 client IO

// joint.dia.Link base model.
// --------------------------
joint.dia.Link = joint.dia.Cell.extend({

    // The default markup for links.
    markup: [
        '<path class="connection" stroke="black"/>',
        '<path class="marker-source" fill="black" stroke="black" />',
        '<path class="marker-target" fill="black" stroke="black" />',
        '<path class="connection-wrap"/>',
        '<g class="labels"/>',
        '<g class="marker-vertices"/>',
        '<g class="marker-arrowheads"/>',
        '<g class="link-tools"/>'
    ].join(''),

    labelMarkup: [
        '<g class="label">',
        '<rect />',
        '<text />',
        '</g>'
    ].join(''),

    toolMarkup: [
        '<g class="link-tool">',
        '<g class="tool-remove" event="remove">',
        '<circle r="11" />',
        '<path transform="scale(.8) translate(-16, -16)" d="M24.778,21.419 19.276,15.917 24.777,10.415 21.949,7.585 16.447,13.087 10.945,7.585 8.117,10.415 13.618,15.917 8.116,21.419 10.946,24.248 16.447,18.746 21.948,24.248z"/>',
        '<title>Remove link.</title>',
        '</g>',
        '<g class="tool-options" event="link:options">',
        '<circle r="11" transform="translate(25)"/>',
        '<path fill="white" transform="scale(.55) translate(29, -16)" d="M31.229,17.736c0.064-0.571,0.104-1.148,0.104-1.736s-0.04-1.166-0.104-1.737l-4.377-1.557c-0.218-0.716-0.504-1.401-0.851-2.05l1.993-4.192c-0.725-0.91-1.549-1.734-2.458-2.459l-4.193,1.994c-0.647-0.347-1.334-0.632-2.049-0.849l-1.558-4.378C17.165,0.708,16.588,0.667,16,0.667s-1.166,0.041-1.737,0.105L12.707,5.15c-0.716,0.217-1.401,0.502-2.05,0.849L6.464,4.005C5.554,4.73,4.73,5.554,4.005,6.464l1.994,4.192c-0.347,0.648-0.632,1.334-0.849,2.05l-4.378,1.557C0.708,14.834,0.667,15.412,0.667,16s0.041,1.165,0.105,1.736l4.378,1.558c0.217,0.715,0.502,1.401,0.849,2.049l-1.994,4.193c0.725,0.909,1.549,1.733,2.459,2.458l4.192-1.993c0.648,0.347,1.334,0.633,2.05,0.851l1.557,4.377c0.571,0.064,1.148,0.104,1.737,0.104c0.588,0,1.165-0.04,1.736-0.104l1.558-4.377c0.715-0.218,1.399-0.504,2.049-0.851l4.193,1.993c0.909-0.725,1.733-1.549,2.458-2.458l-1.993-4.193c0.347-0.647,0.633-1.334,0.851-2.049L31.229,17.736zM16,20.871c-2.69,0-4.872-2.182-4.872-4.871c0-2.69,2.182-4.872,4.872-4.872c2.689,0,4.871,2.182,4.871,4.872C20.871,18.689,18.689,20.871,16,20.871z"/>',
        '<title>Link options.</title>',
        '</g>',
        '</g>'
    ].join(''),

    // The default markup for showing/removing vertices. These elements are the children of the .marker-vertices element (see `this.markup`).
    // Only .marker-vertex and .marker-vertex-remove element have special meaning. The former is used for
    // dragging vertices (changin their position). The latter is used for removing vertices.
    vertexMarkup: [
        '<g class="marker-vertex-group" transform="translate(<%= x %>, <%= y %>)">',
        '<circle class="marker-vertex" idx="<%= idx %>" r="10" />',
        '<path class="marker-vertex-remove-area" idx="<%= idx %>" d="M16,5.333c-7.732,0-14,4.701-14,10.5c0,1.982,0.741,3.833,2.016,5.414L2,25.667l5.613-1.441c2.339,1.317,5.237,2.107,8.387,2.107c7.732,0,14-4.701,14-10.5C30,10.034,23.732,5.333,16,5.333z" transform="translate(5, -33)"/>',
        '<path class="marker-vertex-remove" idx="<%= idx %>" transform="scale(.8) translate(9.5, -37)" d="M24.778,21.419 19.276,15.917 24.777,10.415 21.949,7.585 16.447,13.087 10.945,7.585 8.117,10.415 13.618,15.917 8.116,21.419 10.946,24.248 16.447,18.746 21.948,24.248z">',
        '<title>Remove vertex.</title>',
        '</path>',
        '</g>'
    ].join(''),

    arrowheadMarkup: [
        '<g class="marker-arrowhead-group marker-arrowhead-group-<%= end %>">',
        '<path class="marker-arrowhead" end="<%= end %>" d="M 26 0 L 0 13 L 26 26 z" />',
        '</g>'
    ].join(''),

    defaults: {

        type: 'link',
        source: {},
        target: {}
    },

    disconnect: function() {

        return this.set({ source: g.point(0, 0), target: g.point(0, 0) });
    },

    // A convenient way to set labels. Currently set values will be mixined with `value` if used as a setter.
    label: function(idx, value) {

        idx = idx || 0;

        var labels = this.get('labels') || [];

        // Is it a getter?
        if (arguments.length === 0 || arguments.length === 1) {

            return labels[idx];
        }

        var newValue = _.merge({}, labels[idx], value);

        var newLabels = labels.slice();
        newLabels[idx] = newValue;

        return this.set({ labels: newLabels });
    },

    translate: function(tx, ty, opt) {

        var attrs = {};
        var source = this.get('source');
        var target = this.get('target');
        var vertices = this.get('vertices');

        if (!source.id) {
            attrs.source = { x: source.x + tx, y: source.y + ty };
        }

        if (!target.id) {
            attrs.target = { x: target.x + tx, y: target.y + ty };
        }

        if (vertices && vertices.length) {
            attrs.vertices = _.map(vertices, function(vertex) {
                return { x: vertex.x + tx, y: vertex.y + ty };
            });
        }

        return this.set(attrs, opt);
    },

    reparent: function(opt) {

        var newParent;

        if (this.collection) {

            var source = this.collection.get(this.get('source').id);
            var target = this.collection.get(this.get('target').id);
            var prevParent = this.collection.get(this.get('parent'));

            if (source && target) {
                newParent = this.collection.getCommonAncestor(source, target);
            }

            if (prevParent && (!newParent || newParent.id != prevParent.id)) {
                // Unembed the link if source and target has no common ancestor
                // or common ancestor changed
                prevParent.unembed(this, opt);
            }

            if (newParent) {
                newParent.embed(this, opt);
            }
        }

        return newParent;
    },

    isLink: function() {

        return true;
    },

    hasLoop: function() {

        var sourceId = this.get('source').id;
        var targetId = this.get('target').id;

        return sourceId && targetId && sourceId == targetId;
    }
});


// joint.dia.Link base view and controller.
// ----------------------------------------

joint.dia.LinkView = joint.dia.CellView.extend({

    className: function() {
        return _.unique(this.model.get('type').split('.').concat('link')).join(' ');
    },

    options: {

        shortLinkLength: 100,
        doubleLinkTools: false,
        longLinkLength: 160,
        linkToolsOffset: 40,
        doubleLinkToolsOffset: 60,
        sampleInterval: 50
    },

    initialize: function(options) {

        joint.dia.CellView.prototype.initialize.apply(this, arguments);

        // create methods in prototype, so they can be accessed from any instance and
        // don't need to be create over and over
        if (typeof this.constructor.prototype.watchSource !== 'function') {
            this.constructor.prototype.watchSource = this.createWatcher('source');
            this.constructor.prototype.watchTarget = this.createWatcher('target');
        }

        // `_.labelCache` is a mapping of indexes of labels in the `this.get('labels')` array to
        // `<g class="label">` nodes wrapped by Vectorizer. This allows for quick access to the
        // nodes in `updateLabelPosition()` in order to update the label positions.
        this._labelCache = {};

        // keeps markers bboxes and positions again for quicker access
        this._markerCache = {};

        // bind events
        this.startListening();
    },

    startListening: function() {

        var model = this.model;

        this.listenTo(model, 'change:markup', this.render);
        this.listenTo(model, 'change:smooth change:manhattan change:router change:connector', this.update);
        this.listenTo(model, 'change:toolMarkup', this.onToolsChange);
        this.listenTo(model, 'change:labels change:labelMarkup', this.onLabelsChange);
        this.listenTo(model, 'change:vertices change:vertexMarkup', this.onVerticesChange);
        this.listenTo(model, 'change:source', this.onSourceChange);
        this.listenTo(model, 'change:target', this.onTargetChange);
    },

    onSourceChange: function(cell, source) {

        this.watchSource(cell, source).update();
    },

    onTargetChange: function(cell, target) {

        this.watchTarget(cell, target).update();
    },

    onVerticesChange: function(cell, changed, opt) {

        this.renderVertexMarkers();

        // If the vertices have been changed by a translation we do update only if the link was
        // the only link that was translated. If the link was translated via another element which the link
        // is embedded in, this element will be translated as well and that triggers an update.
        // Note that all embeds in a model are sorted - first comes links, then elements.
        if (!opt.translateBy || opt.translateBy === this.model.id || this.model.hasLoop()) {
            // Vertices were changed (not as a reaction on translate) or link.translate() was called or
            // we're dealing with a loop link that is embedded.
            this.update();
        }
    },

    onToolsChange: function() {

        this.renderTools().updateToolsPosition();
    },

    onLabelsChange: function() {

        this.renderLabels().updateLabelPositions();
    },

    // Rendering
    //----------

    render: function() {

        this.$el.empty();

        // A special markup can be given in the `properties.markup` property. This might be handy
        // if e.g. arrowhead markers should be `<image>` elements or any other element than `<path>`s.
        // `.connection`, `.connection-wrap`, `.marker-source` and `.marker-target` selectors
        // of elements with special meaning though. Therefore, those classes should be preserved in any
        // special markup passed in `properties.markup`.
        var children = V(this.model.get('markup') || this.model.markup);

        // custom markup may contain only one children
        if (!_.isArray(children)) children = [children];

        // Cache all children elements for quicker access.
        this._V = {}; // vectorized markup;
        _.each(children, function(child) {
            var c = child.attr('class');
            c && (this._V[$.camelCase(c)] = child);
        }, this);

        // Only the connection path is mandatory
        if (!this._V.connection) throw new Error('link: no connection path in the markup');

        // partial rendering
        this.renderTools();
        this.renderVertexMarkers();
        this.renderArrowheadMarkers();

        this.vel.append(children);

        // rendering labels has to be run after the link is appended to DOM tree. (otherwise <Text> bbox
        // returns zero values)
        this.renderLabels();

        // start watching the ends of the link for changes
        this.watchSource(this.model, this.model.get('source'))
            .watchTarget(this.model, this.model.get('target'))
            .update();

        return this;
    },

    renderLabels: function() {

        if (!this._V.labels) return this;

        this._labelCache = {};
        var $labels = $(this._V.labels.node).empty();

        var labels = this.model.get('labels') || [];
        if (!labels.length) return this;

        var labelTemplate = _.template(this.model.get('labelMarkup') || this.model.labelMarkup);
        // This is a prepared instance of a vectorized SVGDOM node for the label element resulting from
        // compilation of the labelTemplate. The purpose is that all labels will just `clone()` this
        // node to create a duplicate.
        var labelNodeInstance = V(labelTemplate());

        var canLabelMove = this.can('labelMove');

        _.each(labels, function(label, idx) {

            var labelNode = labelNodeInstance.clone().node;
            V(labelNode).attr('label-idx', idx);
            if (canLabelMove) {
                V(labelNode).attr('cursor', 'move');
            }

            // Cache label nodes so that the `updateLabels()` can just update the label node positions.
            this._labelCache[idx] = V(labelNode);

            var $text = $(labelNode).find('text');
            var $rect = $(labelNode).find('rect');

            // Text attributes with the default `text-anchor` and font-size set.
            var textAttributes = _.extend({ 'text-anchor': 'middle', 'font-size': 14 }, joint.util.getByPath(label, 'attrs/text', '/'));

            $text.attr(_.omit(textAttributes, 'text'));

            if (!_.isUndefined(textAttributes.text)) {

                V($text[0]).text(textAttributes.text + '');
            }

            // Note that we first need to append the `<text>` element to the DOM in order to
            // get its bounding box.
            $labels.append(labelNode);

            // `y-alignment` - center the text element around its y coordinate.
            var textBbox = V($text[0]).bbox(true, $labels[0]);
            V($text[0]).translate(0, -textBbox.height / 2);

            // Add default values.
            var rectAttributes = _.extend({

                fill: 'white',
                rx: 3,
                ry: 3

            }, joint.util.getByPath(label, 'attrs/rect', '/'));

            $rect.attr(_.extend(rectAttributes, {
                x: textBbox.x,
                y: textBbox.y - textBbox.height / 2,  // Take into account the y-alignment translation.
                width: textBbox.width,
                height: textBbox.height
            }));

        }, this);

        return this;
    },

    renderTools: function() {

        if (!this._V.linkTools) return this;

        // Tools are a group of clickable elements that manipulate the whole link.
        // A good example of this is the remove tool that removes the whole link.
        // Tools appear after hovering the link close to the `source` element/point of the link
        // but are offset a bit so that they don't cover the `marker-arrowhead`.

        var $tools = $(this._V.linkTools.node).empty();
        var toolTemplate = _.template(this.model.get('toolMarkup') || this.model.toolMarkup);
        var tool = V(toolTemplate());

        $tools.append(tool.node);

        // Cache the tool node so that the `updateToolsPosition()` can update the tool position quickly.
        this._toolCache = tool;

        // If `doubleLinkTools` is enabled, we render copy of the tools on the other side of the
        // link as well but only if the link is longer than `longLinkLength`.
        if (this.options.doubleLinkTools) {

            var tool2 = tool.clone();
            $tools.append(tool2.node);
            this._tool2Cache = tool2;
        }

        return this;
    },

    renderVertexMarkers: function() {

        if (!this._V.markerVertices) return this;

        var $markerVertices = $(this._V.markerVertices.node).empty();

        // A special markup can be given in the `properties.vertexMarkup` property. This might be handy
        // if default styling (elements) are not desired. This makes it possible to use any
        // SVG elements for .marker-vertex and .marker-vertex-remove tools.
        var markupTemplate = _.template(this.model.get('vertexMarkup') || this.model.vertexMarkup);

        _.each(this.model.get('vertices'), function(vertex, idx) {

            $markerVertices.append(V(markupTemplate(_.extend({ idx: idx }, vertex))).node);
        });

        return this;
    },

    renderArrowheadMarkers: function() {

        // Custom markups might not have arrowhead markers. Therefore, jump of this function immediately if that's the case.
        if (!this._V.markerArrowheads) return this;

        var $markerArrowheads = $(this._V.markerArrowheads.node);

        $markerArrowheads.empty();

        // A special markup can be given in the `properties.vertexMarkup` property. This might be handy
        // if default styling (elements) are not desired. This makes it possible to use any
        // SVG elements for .marker-vertex and .marker-vertex-remove tools.
        var markupTemplate = _.template(this.model.get('arrowheadMarkup') || this.model.arrowheadMarkup);

        this._V.sourceArrowhead = V(markupTemplate({ end: 'source' }));
        this._V.targetArrowhead = V(markupTemplate({ end: 'target' }));

        $markerArrowheads.append(this._V.sourceArrowhead.node, this._V.targetArrowhead.node);

        return this;
    },

    // Updating
    //---------

    // Default is to process the `attrs` object and set attributes on subelements based on the selectors.
    update: function() {

        // Update attributes.
        _.each(this.model.get('attrs'), function(attrs, selector) {

            var processedAttributes = [];

            // If the `fill` or `stroke` attribute is an object, it is in the special JointJS gradient format and so
            // it becomes a special attribute and is treated separately.
            if (_.isObject(attrs.fill)) {

                this.applyGradient(selector, 'fill', attrs.fill);
                processedAttributes.push('fill');
            }

            if (_.isObject(attrs.stroke)) {

                this.applyGradient(selector, 'stroke', attrs.stroke);
                processedAttributes.push('stroke');
            }

            // If the `filter` attribute is an object, it is in the special JointJS filter format and so
            // it becomes a special attribute and is treated separately.
            if (_.isObject(attrs.filter)) {

                this.applyFilter(selector, attrs.filter);
                processedAttributes.push('filter');
            }

            // remove processed special attributes from attrs
            if (processedAttributes.length > 0) {

                processedAttributes.unshift(attrs);
                attrs = _.omit.apply(_, processedAttributes);
            }

            this.findBySelector(selector).attr(attrs);

        }, this);

        // Path finding
        var vertices = this.route = this.findRoute(this.model.get('vertices') || []);

        // finds all the connection points taking new vertices into account
        this._findConnectionPoints(vertices);

        var pathData = this.getPathData(vertices);

        // The markup needs to contain a `.connection`
        this._V.connection.attr('d', pathData);
        this._V.connectionWrap && this._V.connectionWrap.attr('d', pathData);

        this._translateAndAutoOrientArrows(this._V.markerSource, this._V.markerTarget);

        //partials updates
        this.updateLabelPositions();
        this.updateToolsPosition();
        this.updateArrowheadMarkers();

        delete this.options.perpendicular;
        // Mark that postponed update has been already executed.
        this.updatePostponed = false;

        return this;
    },

    _findConnectionPoints: function(vertices) {

        // cache source and target points
        var sourcePoint, targetPoint, sourceMarkerPoint, targetMarkerPoint;

        var firstVertex = _.first(vertices);

        sourcePoint = this.getConnectionPoint(
            'source', this.model.get('source'), firstVertex || this.model.get('target')
        ).round();

        var lastVertex = _.last(vertices);

        targetPoint = this.getConnectionPoint(
            'target', this.model.get('target'), lastVertex || sourcePoint
        ).round();

        // Move the source point by the width of the marker taking into account
        // its scale around x-axis. Note that scale is the only transform that
        // makes sense to be set in `.marker-source` attributes object
        // as all other transforms (translate/rotate) will be replaced
        // by the `translateAndAutoOrient()` function.
        var cache = this._markerCache;

        if (this._V.markerSource) {

            cache.sourceBBox = cache.sourceBBox || this._V.markerSource.bbox(true);

            sourceMarkerPoint = g.point(sourcePoint).move(
                firstVertex || targetPoint,
                cache.sourceBBox.width * this._V.markerSource.scale().sx * -1
            ).round();
        }

        if (this._V.markerTarget) {

            cache.targetBBox = cache.targetBBox || this._V.markerTarget.bbox(true);

            targetMarkerPoint = g.point(targetPoint).move(
                lastVertex || sourcePoint,
                cache.targetBBox.width * this._V.markerTarget.scale().sx * -1
            ).round();
        }

        // if there was no markup for the marker, use the connection point.
        cache.sourcePoint = sourceMarkerPoint || sourcePoint;
        cache.targetPoint = targetMarkerPoint || targetPoint;

        // make connection points public
        this.sourcePoint = sourcePoint;
        this.targetPoint = targetPoint;
    },

    updateLabelPositions: function() {

        if (!this._V.labels) return this;

        // This method assumes all the label nodes are stored in the `this._labelCache` hash table
        // by their indexes in the `this.get('labels')` array. This is done in the `renderLabels()` method.

        var labels = this.model.get('labels') || [];
        if (!labels.length) return this;

        var connectionElement = this._V.connection.node;
        var connectionLength = connectionElement.getTotalLength();

        // Firefox returns connectionLength=NaN in odd cases (for bezier curves).
        // In that case we won't update labels at all.
        if (!_.isNaN(connectionLength)) {

            var samples;

            _.each(labels, function(label, idx) {

                var position = label.position;
                var distance = _.isObject(position) ? position.distance : position;
                var offset = _.isObject(position) ? position.offset : { x: 0, y: 0 };

                distance = (distance > connectionLength) ? connectionLength : distance; // sanity check
                distance = (distance < 0) ? connectionLength + distance : distance;
                distance = (distance > 1) ? distance : connectionLength * distance;

                var labelCoordinates = connectionElement.getPointAtLength(distance);

                if (_.isObject(offset)) {

                    // Just offset the label by the x,y provided in the offset object.
                    labelCoordinates = g.point(labelCoordinates).offset(offset.x, offset.y);

                } else if (_.isNumber(offset)) {

                    if (!samples) {
                        samples = this._samples || this._V.connection.sample(this.options.sampleInterval);
                    }

                    // Offset the label by the amount provided in `offset` to an either
                    // side of the link.

                    // 1. Find the closest sample & its left and right neighbours.
                    var minSqDistance = Infinity;
                    var closestSample;
                    var closestSampleIndex;
                    var p;
                    var sqDistance;
                    for (var i = 0, len = samples.length; i < len; i++) {
                        p = samples[i];
                        sqDistance = g.line(p, labelCoordinates).squaredLength();
                        if (sqDistance < minSqDistance) {
                            minSqDistance = sqDistance;
                            closestSample = p;
                            closestSampleIndex = i;
                        }
                    }
                    var prevSample = samples[closestSampleIndex - 1];
                    var nextSample = samples[closestSampleIndex + 1];

                    // 2. Offset the label on the perpendicular line between
                    // the current label coordinate ("at `distance`") and
                    // the next sample.
                    var angle = 0;
                    if (nextSample) {
                        angle = g.point(labelCoordinates).theta(nextSample);
                    } else if (prevSample) {
                        angle = g.point(prevSample).theta(labelCoordinates);
                    }
                    labelCoordinates = g.point(labelCoordinates).offset(offset).rotate(labelCoordinates, angle - 90);
                }

                this._labelCache[idx].attr('transform', 'translate(' + labelCoordinates.x + ', ' + labelCoordinates.y + ')');

            }, this);
        }

        return this;
    },


    updateToolsPosition: function() {

        if (!this._V.linkTools) return this;

        // Move the tools a bit to the target position but don't cover the `sourceArrowhead` marker.
        // Note that the offset is hardcoded here. The offset should be always
        // more than the `this.$('.marker-arrowhead[end="source"]')[0].bbox().width` but looking
        // this up all the time would be slow.

        var scale = '';
        var offset = this.options.linkToolsOffset;
        var connectionLength = this.getConnectionLength();

        // Firefox returns connectionLength=NaN in odd cases (for bezier curves).
        // In that case we won't update tools position at all.
        if (!_.isNaN(connectionLength)) {

            // If the link is too short, make the tools half the size and the offset twice as low.
            if (connectionLength < this.options.shortLinkLength) {
                scale = 'scale(.5)';
                offset /= 2;
            }

            var toolPosition = this.getPointAtLength(offset);

            this._toolCache.attr('transform', 'translate(' + toolPosition.x + ', ' + toolPosition.y + ') ' + scale);

            if (this.options.doubleLinkTools && connectionLength >= this.options.longLinkLength) {

                var doubleLinkToolsOffset = this.options.doubleLinkToolsOffset || offset;

                toolPosition = this.getPointAtLength(connectionLength - doubleLinkToolsOffset);
                this._tool2Cache.attr('transform', 'translate(' + toolPosition.x + ', ' + toolPosition.y + ') ' + scale);
                this._tool2Cache.attr('visibility', 'visible');

            } else if (this.options.doubleLinkTools) {

                this._tool2Cache.attr('visibility', 'hidden');
            }
        }

        return this;
    },


    updateArrowheadMarkers: function() {

        if (!this._V.markerArrowheads) return this;

        // getting bbox of an element with `display="none"` in IE9 ends up with access violation
        if ($.css(this._V.markerArrowheads.node, 'display') === 'none') return this;

        var sx = this.getConnectionLength() < this.options.shortLinkLength ? .5 : 1;
        this._V.sourceArrowhead.scale(sx);
        this._V.targetArrowhead.scale(sx);

        this._translateAndAutoOrientArrows(this._V.sourceArrowhead, this._V.targetArrowhead);

        return this;
    },

    // Returns a function observing changes on an end of the link. If a change happens and new end is a new model,
    // it stops listening on the previous one and starts listening to the new one.
    createWatcher: function(endType) {

        // create handler for specific end type (source|target).
        var onModelChange = _.partial(this.onEndModelChange, endType);

        function watchEndModel(link, end) {

            end = end || {};

            var endModel = null;
            var previousEnd = link.previous(endType) || {};

            if (previousEnd.id) {
                this.stopListening(this.paper.getModelById(previousEnd.id), 'change', onModelChange);
            }

            if (end.id) {
                // If the observed model changes, it caches a new bbox and do the link update.
                endModel = this.paper.getModelById(end.id);
                this.listenTo(endModel, 'change', onModelChange);
            }

            onModelChange.call(this, endModel, { cacheOnly: true });

            return this;
        }

        return watchEndModel;
    },

    onEndModelChange: function(endType, endModel, opt) {

        var doUpdate = !opt.cacheOnly;
        var end = this.model.get(endType) || {};

        if (endModel) {

            var selector = this.constructor.makeSelector(end);
            var oppositeEndType = endType == 'source' ? 'target' : 'source';
            var oppositeEnd = this.model.get(oppositeEndType) || {};
            var oppositeSelector = oppositeEnd.id && this.constructor.makeSelector(oppositeEnd);

            // Caching end models bounding boxes.
            // If `opt.handleBy` equals the client-side ID of this link view and it is a loop link, then we already cached
            // the bounding boxes in the previous turn (e.g. for loop link, the change:source event is followed
            // by change:target and so on change:source, we already chached the bounding boxes of - the same - element).
            if (opt.handleBy === this.cid && selector == oppositeSelector) {

                // Source and target elements are identical. We're dealing with a loop link. We are handling `change` event for the
                // second time now. There is no need to calculate bbox and find magnet element again.
                // It was calculated already for opposite link end.
                this[endType + 'BBox'] = this[oppositeEndType + 'BBox'];
                this[endType + 'View'] = this[oppositeEndType + 'View'];
                this[endType + 'Magnet'] = this[oppositeEndType + 'Magnet'];

            } else if (opt.translateBy) {
                // `opt.translateBy` optimizes the way we calculate bounding box of the source/target element.
                // If `opt.translateBy` is an ID of the element that was originally translated. This allows us
                // to just offset the cached bounding box by the translation instead of calculating the bounding
                // box from scratch on every translate.

                var bbox = this[endType + 'BBox'];
                bbox.x += opt.tx;
                bbox.y += opt.ty;

            } else {
                // The slowest path, source/target could have been rotated or resized or any attribute
                // that affects the bounding box of the view might have been changed.

                var view = this.paper.findViewByModel(end.id);
                var magnetElement = view.el.querySelector(selector);

                this[endType + 'BBox'] = view.getStrokeBBox(magnetElement);
                this[endType + 'View'] = view;
                this[endType + 'Magnet'] = magnetElement;
            }

            if (opt.handleBy === this.cid && opt.translateBy &&
                this.model.isEmbeddedIn(endModel) &&
                !_.isEmpty(this.model.get('vertices'))) {
                // Loop link whose element was translated and that has vertices (that need to be translated with
                // the parent in which my element is embedded).
                // If the link is embedded, has a loop and vertices and the end model
                // has been translated, do not update yet. There are vertices still to be updated (change:vertices
                // event will come in the next turn).
                doUpdate = false;
            }

            if (!this.updatePostponed && oppositeEnd.id) {
                // The update was not postponed (that can happen e.g. on the first change event) and the opposite
                // end is a model (opposite end is the opposite end of the link we're just updating, e.g. if
                // we're reacting on change:source event, the oppositeEnd is the target model).

                var oppositeEndModel = this.paper.getModelById(oppositeEnd.id);

                // Passing `handleBy` flag via event option.
                // Note that if we are listening to the same model for event 'change' twice.
                // The same event will be handled by this method also twice.
                if (end.id === oppositeEnd.id) {
                    // We're dealing with a loop link. Tell the handlers in the next turn that they should update
                    // the link instead of me. (We know for sure there will be a next turn because
                    // loop links react on at least two events: change on the source model followed by a change on
                    // the target model).
                    opt.handleBy = this.cid;
                }

                if (opt.handleBy === this.cid || (opt.translateBy && oppositeEndModel.isEmbeddedIn(opt.translateBy))) {

                    // Here are two options:
                    // - Source and target are connected to the same model (not necessarily the same port).
                    // - Both end models are translated by the same ancestor. We know that opposite end
                    //   model will be translated in the next turn as well.
                    // In both situations there will be more changes on the model that trigger an
                    // update. So there is no need to update the linkView yet.
                    this.updatePostponed = true;
                    doUpdate = false;
                }
            }

        } else {

            // the link end is a point ~ rect 1x1
            this[endType + 'BBox'] = g.rect(end.x || 0, end.y || 0, 1, 1);
            this[endType + 'View'] = this[endType + 'Magnet'] = null;
        }

        // keep track which end had been changed very last
        this.lastEndChange = endType;

        doUpdate && this.update();
    },

    _translateAndAutoOrientArrows: function(sourceArrow, targetArrow) {

        // Make the markers "point" to their sticky points being auto-oriented towards
        // `targetPosition`/`sourcePosition`. And do so only if there is a markup for them.
        if (sourceArrow) {
            sourceArrow.translateAndAutoOrient(
                this.sourcePoint,
                _.first(this.route) || this.targetPoint,
                this.paper.viewport
            );
        }

        if (targetArrow) {
            targetArrow.translateAndAutoOrient(
                this.targetPoint,
                _.last(this.route) || this.sourcePoint,
                this.paper.viewport
            );
        }
    },

    removeVertex: function(idx) {

        var vertices = _.clone(this.model.get('vertices'));

        if (vertices && vertices.length) {

            vertices.splice(idx, 1);
            this.model.set('vertices', vertices, { ui: true });
        }

        return this;
    },

    // This method ads a new vertex to the `vertices` array of `.connection`. This method
    // uses a heuristic to find the index at which the new `vertex` should be placed at assuming
    // the new vertex is somewhere on the path.
    addVertex: function(vertex) {

        // As it is very hard to find a correct index of the newly created vertex,
        // a little heuristics is taking place here.
        // The heuristics checks if length of the newly created
        // path is lot more than length of the old path. If this is the case,
        // new vertex was probably put into a wrong index.
        // Try to put it into another index and repeat the heuristics again.

        var vertices = (this.model.get('vertices') || []).slice();
        // Store the original vertices for a later revert if needed.
        var originalVertices = vertices.slice();

        // A `<path>`