determineFn

determineFn = function(fn, ctx){

		// look for function name on the context
		if( _.isString(fn) ){

			if( !ctx ){
				console.error('Could not bind onClick “'+fn+'”; please provide a context')
				fn = null;

			}else if( ctx[fn] && _.isFunction(ctx[fn]) ){
				fn = ctx[fn].bind(ctx);
			
			}else{
				console.error('Method “'+fn+'” does not exist on context:', ctx)
				fn = null;
			}

		}else if( fn && _.isFunction(fn) ){
			fn = fn.bind(ctx)

		}else{
			fn = null;
		}

		return fn;
	}