Initialiser.js

APP.initialiser = {
		// use as keywords, add to a 'global' fn queue, and decide when the 'global' queue is ready to execute.
		keys: ['global', 'shop', 'photoswipe'],
	    statuses: {},
		add: function( when, fn ) {
			// you don't get to pass arguments to the init queue!

			// do we have this status object?
			// if not then there's no queue set thus we aren't
			// expecting anything to resolve this...
			if ( !this.statuses.hasOwnProperty( when ) ) {
				fn();
				return;
			}

			var obj = this.statuses[when];

			if (obj.status === "pending") {
				// we're not ready yet, store in the q
				obj.fnQ.push( fn );
			} else {
				fn();
			}
		},

		start: function( when ) {

			if ( !this.statuses.hasOwnProperty( when ) ) {
				return;
			}
			console.log("starting " + when);
			var obj = this.statuses[when];

			if (obj.status === "pending") {
				obj.fnQ.forEach( function( fn, i ) {
					console.log('running ' + i);
					fn();
				});

				// for extra security, empty out the functions:
				obj.fnQ = [];

				// and set the status to done
				obj.status = "done";
			}
		}
	};

	APP.initialiser.keys.forEach( function( key ) {
		APP.initialiser.statuses[key] = {
			fnQ: [],
			status: "pending"
		}
	});