Actualización

app/Resources/public/assets/imagesloaded/.bower.json

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+{
+  "name": "imagesloaded",
+  "description": "JavaScript is all like _You images done yet or what?_",
+  "main": "imagesloaded.js",
+  "dependencies": {
+    "ev-emitter": "^1.0.0"
+  },
+  "devDependencies": {
+    "jquery": ">=1.9 <4.0",
+    "qunit": "^2.0.0"
+  },
+  "ignore": [
+    "**/.*",
+    "test",
+    "package.json",
+    "composer.json",
+    "node_modules",
+    "bower_components",
+    "tests",
+    "sandbox/",
+    "gulpfile.js",
+    "contributing.md"
+  ],
+  "homepage": "http://imagesloaded.desandro.com",
+  "authors": [
+    "David DeSandro"
+  ],
+  "moduleType": [
+    "amd",
+    "globals",
+    "node"
+  ],
+  "keywords": [
+    "images"
+  ],
+  "license": "MIT",
+  "version": "4.1.4",
+  "_release": "4.1.4",
+  "_resolution": {
+    "type": "version",
+    "tag": "v4.1.4",
+    "commit": "704b99eef3e77c1d46ee03575297e2114f21f616"
+  },
+  "_source": "https://github.com/desandro/imagesloaded.git",
+  "_target": ">=3.0.0",
+  "_originalSource": "imagesloaded"
+}

app/Resources/public/assets/imagesloaded/README.md

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+# imagesLoaded
+
+<p class="tagline">JavaScript is all like "You images done yet or what?"</p>
+
+[imagesloaded.desandro.com](http://imagesloaded.desandro.com)
+
+Detect when images have been loaded.
+
+## Install
+
+### Download
+
++ [imagesloaded.pkgd.min.js](https://unpkg.com/imagesloaded@4/imagesloaded.pkgd.min.js) minified
++ [imagesloaded.pkgd.js](https://unpkg.com/imagesloaded@4/imagesloaded.pkgd.js) un-minified
+
+### CDN
+
+``` html
+<script src="https://unpkg.com/imagesloaded@4/imagesloaded.pkgd.min.js"></script>
+<!-- or -->
+<script src="https://unpkg.com/imagesloaded@4/imagesloaded.pkgd.js"></script>
+```
+
+### Package managers
+
+Install via [npm](https://www.npmjs.com/package/imagesloaded): `npm install imagesloaded`
+
+Install via [Bower](http://bower.io): `bower install imagesloaded --save`
+
+## jQuery
+
+You can use imagesLoaded as a jQuery Plugin.
+
+``` js
+$('#container').imagesLoaded( function() {
+  // images have loaded
+});
+
+// options
+$('#container').imagesLoaded( {
+  // options...
+  },
+  function() {
+    // images have loaded
+  }
+);
+```
+
+`.imagesLoaded()` returns a [jQuery Deferred object](http://api.jquery.com/category/deferred-object/). This allows you to use `.always()`, `.done()`, `.fail()` and `.progress()`.
+
+``` js
+$('#container').imagesLoaded()
+  .always( function( instance ) {
+    console.log('all images loaded');
+  })
+  .done( function( instance ) {
+    console.log('all images successfully loaded');
+  })
+  .fail( function() {
+    console.log('all images loaded, at least one is broken');
+  })
+  .progress( function( instance, image ) {
+    var result = image.isLoaded ? 'loaded' : 'broken';
+    console.log( 'image is ' + result + ' for ' + image.img.src );
+  });
+```
+
+## Vanilla JavaScript
+
+You can use imagesLoaded with vanilla JS.
+
+``` js
+imagesLoaded( elem, callback )
+// options
+imagesLoaded( elem, options, callback )
+// you can use `new` if you like
+new imagesLoaded( elem, callback )
+```
+
++ `elem` _Element, NodeList, Array, or Selector String_
++ `options` _Object_
++ `callback` _Function_ - function triggered after all images have been loaded
+
+Using a callback function is the same as binding it to the `always` event (see below).
+
+``` js
+// element
+imagesLoaded( document.querySelector('#container'), function( instance ) {
+  console.log('all images are loaded');
+});
+// selector string
+imagesLoaded( '#container', function() {...});
+// multiple elements
+var posts = document.querySelectorAll('.post');
+imagesLoaded( posts, function() {...});
+```
+
+Bind events with vanilla JS with .on(), .off(), and .once() methods.
+
+``` js
+var imgLoad = imagesLoaded( elem );
+function onAlways( instance ) {
+  console.log('all images are loaded');
+}
+// bind with .on()
+imgLoad.on( 'always', onAlways );
+// unbind with .off()
+imgLoad.off( 'always', onAlways );
+```
+
+## Background
+
+Detect when background images have loaded, in addition to `<img>`s.
+
+Set `{ background: true }` to detect when the element's background image has loaded.
+
+``` js
+// jQuery
+$('#container').imagesLoaded( { background: true }, function() {
+  console.log('#container background image loaded');
+});
+
+// vanilla JS
+imagesLoaded( '#container', { background: true }, function() {
+  console.log('#container background image loaded');
+});
+```
+
+[See jQuery demo](http://codepen.io/desandro/pen/pjVMPB) or [vanilla JS demo](http://codepen.io/desandro/pen/avKooW) on CodePen.
+
+Set to a selector string like `{ background: '.item' }` to detect when the background images of child elements have loaded.
+
+``` js
+// jQuery
+$('#container').imagesLoaded( { background: '.item' }, function() {
+  console.log('all .item background images loaded');
+});
+
+// vanilla JS
+imagesLoaded( '#container', { background: '.item' }, function() {
+  console.log('all .item background images loaded');
+});
+```
+
+[See jQuery demo](http://codepen.io/desandro/pen/avKoZL) or [vanilla JS demo](http://codepen.io/desandro/pen/vNrBGz) on CodePen.
+
+## Events
+
+### always
+
+``` js
+// jQuery
+$('#container').imagesLoaded().always( function( instance ) {
+  console.log('ALWAYS - all images have been loaded');
+});
+
+// vanilla JS
+imgLoad.on( 'always', function( instance ) {
+  console.log('ALWAYS - all images have been loaded');
+});
+```
+
+Triggered after all images have been either loaded or confirmed broken.
+
++ `instance` _imagesLoaded_ - the imagesLoaded instance
+
+### done
+
+``` js
+// jQuery
+$('#container').imagesLoaded().done( function( instance ) {
+  console.log('DONE  - all images have been successfully loaded');
+});
+
+// vanilla JS
+imgLoad.on( 'done', function( instance ) {
+  console.log('DONE  - all images have been successfully loaded');
+});
+```
+
+Triggered after all images have successfully loaded without any broken images.
+
+### fail
+
+``` js
+$('#container').imagesLoaded().fail( function( instance ) {
+  console.log('FAIL - all images loaded, at least one is broken');
+});
+
+// vanilla JS
+imgLoad.on( 'fail', function( instance ) {
+  console.log('FAIL - all images loaded, at least one is broken');
+});
+```
+
+Triggered after all images have been loaded with at least one broken image.
+
+### progress
+
+``` js
+imgLoad.on( 'progress', function( instance, image ) {
+  var result = image.isLoaded ? 'loaded' : 'broken';
+  console.log( 'image is ' + result + ' for ' + image.img.src );
+});
+```
+
+Triggered after each image has been loaded.
+
++ `instance` _imagesLoaded_ - the imagesLoaded instance
++ `image` _LoadingImage_ - the LoadingImage instance of the loaded image
+
+<!-- sponsored -->
+
+## Properties
+
+### LoadingImage.img
+
+_Image_ - The `img` element
+
+### LoadingImage.isLoaded
+
+_Boolean_ - `true` when the image has successfully loaded
+
+### imagesLoaded.images
+
+Array of _LoadingImage_ instances for each image detected
+
+``` js
+var imgLoad = imagesLoaded('#container');
+imgLoad.on( 'always', function() {
+  console.log( imgLoad.images.length + ' images loaded' );
+  // detect which image is broken
+  for ( var i = 0, len = imgLoad.images.length; i < len; i++ ) {
+    var image = imgLoad.images[i];
+    var result = image.isLoaded ? 'loaded' : 'broken';
+    console.log( 'image is ' + result + ' for ' + image.img.src );
+  }
+});
+```
+
+## Browserify
+
+imagesLoaded works with [Browserify](http://browserify.org/).
+
+``` bash
+npm install imagesloaded --save
+```
+
+``` js
+var imagesLoaded = require('imagesloaded');
+
+imagesLoaded( elem, function() {...} );
+```
+
+Use `.makeJQueryPlugin` to make to use `.imagesLoaded()` jQuery plugin.
+
+``` js
+var $ = require('jquery');
+var imagesLoaded = require('imagesloaded');
+
+// provide jQuery argument
+imagesLoaded.makeJQueryPlugin( $ );
+// now use .imagesLoaded() jQuery plugin
+$('#container').imagesLoaded( function() {...});
+```
+
+## Webpack
+
+Install imagesLoaded with npm.
+
+``` bash
+npm install imagesloaded
+```
+
+You can then `require('imagesloaded')`.
+
+``` js
+// main.js
+var imagesLoaded = require('imagesloaded');
+
+imagesLoaded( '#container', function() {
+  // images have loaded
+});
+```
+
+Use `.makeJQueryPlugin` to make `.imagesLoaded()` jQuery plugin.
+
+``` js
+// main.js
+var imagesLoaded = require('imagesloaded');
+var $ = require('jquery');
+
+// provide jQuery argument
+imagesLoaded.makeJQueryPlugin( $ );
+// now use .imagesLoaded() jQuery plugin
+$('#container').imagesLoaded( function() {...});
+```
+
+Run webpack.
+
+``` bash
+webpack main.js bundle.js
+```
+
+## RequireJS
+
+imagesLoaded works with [RequireJS](http://requirejs.org).
+
+You can require [imagesloaded.pkgd.js](http://imagesloaded.desandro.com/imagesloaded.pkgd.js).
+
+``` js
+requirejs( [
+  'path/to/imagesloaded.pkgd.js',
+], function( imagesLoaded ) {
+  imagesLoaded( '#container', function() { ... });
+});
+```
+
+Use `.makeJQueryPlugin` to make `.imagesLoaded()` jQuery plugin.
+
+``` js
+requirejs( [
+  'jquery',
+  'path/to/imagesloaded.pkgd.js',
+], function( $, imagesLoaded ) {
+  // provide jQuery argument
+  imagesLoaded.makeJQueryPlugin( $ );
+  // now use .imagesLoaded() jQuery plugin
+  $('#container').imagesLoaded( function() {...});
+});
+```
+
+You can manage dependencies with [Bower](http://bower.io). Set `baseUrl` to `bower_components` and set a path config for all your application code.
+
+``` js
+requirejs.config({
+  baseUrl: 'bower_components/',
+  paths: { // path to your app
+    app: '../'
+  }
+});
+
+requirejs( [
+  'imagesloaded/imagesloaded',
+  'app/my-component.js'
+], function( imagesLoaded, myComp ) {
+  imagesLoaded( '#container', function() { ... });
+});
+```
+
+## Browser support
+
++ IE9+
++ Android 2.3+
++ iOS Safari 4+
++ All other modern browsers
+
+Use [imagesLoaded v3](http://imagesloaded.desandro.com/v3/) for IE8 support.
+
+## MIT License
+
+imagesLoaded is released under the [MIT License](http://desandro.mit-license.org/). Have at it.

app/Resources/public/assets/imagesloaded/bower.json

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+{
+  "name": "imagesloaded",
+  "description": "JavaScript is all like _You images done yet or what?_",
+  "main": "imagesloaded.js",
+  "dependencies": {
+    "ev-emitter": "^1.0.0"
+  },
+  "devDependencies": {
+    "jquery": ">=1.9 <4.0",
+    "qunit": "^2.0.0"
+  },
+  "ignore": [
+    "**/.*",
+    "test",
+    "package.json",
+    "composer.json",
+    "node_modules",
+    "bower_components",
+    "tests",
+    "sandbox/",
+    "gulpfile.js",
+    "contributing.md"
+  ],
+  "homepage": "http://imagesloaded.desandro.com",
+  "authors": [
+    "David DeSandro"
+  ],
+  "moduleType": [
+    "amd",
+    "globals",
+    "node"
+  ],
+  "keywords": [
+    "images"
+  ],
+  "license": "MIT"
+}

app/Resources/public/assets/imagesloaded/imagesloaded.js

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+/*!
+ * imagesLoaded v4.1.4
+ * JavaScript is all like "You images are done yet or what?"
+ * MIT License
+ */
+
+( function( window, factory ) { 'use strict';
+  // universal module definition
+
+  /*global define: false, module: false, require: false */
+
+  if ( typeof define == 'function' && define.amd ) {
+    // AMD
+    define( [
+      'ev-emitter/ev-emitter'
+    ], function( EvEmitter ) {
+      return factory( window, EvEmitter );
+    });
+  } else if ( typeof module == 'object' && module.exports ) {
+    // CommonJS
+    module.exports = factory(
+      window,
+      require('ev-emitter')
+    );
+  } else {
+    // browser global
+    window.imagesLoaded = factory(
+      window,
+      window.EvEmitter
+    );
+  }
+
+})( typeof window !== 'undefined' ? window : this,
+
+// --------------------------  factory -------------------------- //
+
+function factory( window, EvEmitter ) {
+
+'use strict';
+
+var $ = window.jQuery;
+var console = window.console;
+
+// -------------------------- helpers -------------------------- //
+
+// extend objects
+function extend( a, b ) {
+  for ( var prop in b ) {
+    a[ prop ] = b[ prop ];
+  }
+  return a;
+}
+
+var arraySlice = Array.prototype.slice;
+
+// turn element or nodeList into an array
+function makeArray( obj ) {
+  if ( Array.isArray( obj ) ) {
+    // use object if already an array
+    return obj;
+  }
+
+  var isArrayLike = typeof obj == 'object' && typeof obj.length == 'number';
+  if ( isArrayLike ) {
+    // convert nodeList to array
+    return arraySlice.call( obj );
+  }
+
+  // array of single index
+  return [ obj ];
+}
+
+// -------------------------- imagesLoaded -------------------------- //
+
+/**
+ * @param {Array, Element, NodeList, String} elem
+ * @param {Object or Function} options - if function, use as callback
+ * @param {Function} onAlways - callback function
+ */
+function ImagesLoaded( elem, options, onAlways ) {
+  // coerce ImagesLoaded() without new, to be new ImagesLoaded()
+  if ( !( this instanceof ImagesLoaded ) ) {
+    return new ImagesLoaded( elem, options, onAlways );
+  }
+  // use elem as selector string
+  var queryElem = elem;
+  if ( typeof elem == 'string' ) {
+    queryElem = document.querySelectorAll( elem );
+  }
+  // bail if bad element
+  if ( !queryElem ) {
+    console.error( 'Bad element for imagesLoaded ' + ( queryElem || elem ) );
+    return;
+  }
+
+  this.elements = makeArray( queryElem );
+  this.options = extend( {}, this.options );
+  // shift arguments if no options set
+  if ( typeof options == 'function' ) {
+    onAlways = options;
+  } else {
+    extend( this.options, options );
+  }
+
+  if ( onAlways ) {
+    this.on( 'always', onAlways );
+  }
+
+  this.getImages();
+
+  if ( $ ) {
+    // add jQuery Deferred object
+    this.jqDeferred = new $.Deferred();
+  }
+
+  // HACK check async to allow time to bind listeners
+  setTimeout( this.check.bind( this ) );
+}
+
+ImagesLoaded.prototype = Object.create( EvEmitter.prototype );
+
+ImagesLoaded.prototype.options = {};
+
+ImagesLoaded.prototype.getImages = function() {
+  this.images = [];
+
+  // filter & find items if we have an item selector
+  this.elements.forEach( this.addElementImages, this );
+};
+
+/**
+ * @param {Node} element
+ */
+ImagesLoaded.prototype.addElementImages = function( elem ) {
+  // filter siblings
+  if ( elem.nodeName == 'IMG' ) {
+    this.addImage( elem );
+  }
+  // get background image on element
+  if ( this.options.background === true ) {
+    this.addElementBackgroundImages( elem );
+  }
+
+  // find children
+  // no non-element nodes, #143
+  var nodeType = elem.nodeType;
+  if ( !nodeType || !elementNodeTypes[ nodeType ] ) {
+    return;
+  }
+  var childImgs = elem.querySelectorAll('img');
+  // concat childElems to filterFound array
+  for ( var i=0; i < childImgs.length; i++ ) {
+    var img = childImgs[i];
+    this.addImage( img );
+  }
+
+  // get child background images
+  if ( typeof this.options.background == 'string' ) {
+    var children = elem.querySelectorAll( this.options.background );
+    for ( i=0; i < children.length; i++ ) {
+      var child = children[i];
+      this.addElementBackgroundImages( child );
+    }
+  }
+};
+
+var elementNodeTypes = {
+  1: true,
+  9: true,
+  11: true
+};
+
+ImagesLoaded.prototype.addElementBackgroundImages = function( elem ) {
+  var style = getComputedStyle( elem );
+  if ( !style ) {
+    // Firefox returns null if in a hidden iframe https://bugzil.la/548397
+    return;
+  }
+  // get url inside url("...")
+  var reURL = /url\((['"])?(.*?)\1\)/gi;
+  var matches = reURL.exec( style.backgroundImage );
+  while ( matches !== null ) {
+    var url = matches && matches[2];
+    if ( url ) {
+      this.addBackground( url, elem );
+    }
+    matches = reURL.exec( style.backgroundImage );
+  }
+};
+
+/**
+ * @param {Image} img
+ */
+ImagesLoaded.prototype.addImage = function( img ) {
+  var loadingImage = new LoadingImage( img );
+  this.images.push( loadingImage );
+};
+
+ImagesLoaded.prototype.addBackground = function( url, elem ) {
+  var background = new Background( url, elem );
+  this.images.push( background );
+};
+
+ImagesLoaded.prototype.check = function() {
+  var _this = this;
+  this.progressedCount = 0;
+  this.hasAnyBroken = false;
+  // complete if no images
+  if ( !this.images.length ) {
+    this.complete();
+    return;
+  }
+
+  function onProgress( image, elem, message ) {
+    // HACK - Chrome triggers event before object properties have changed. #83
+    setTimeout( function() {
+      _this.progress( image, elem, message );
+    });
+  }
+
+  this.images.forEach( function( loadingImage ) {
+    loadingImage.once( 'progress', onProgress );
+    loadingImage.check();
+  });
+};
+
+ImagesLoaded.prototype.progress = function( image, elem, message ) {
+  this.progressedCount++;
+  this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded;
+  // progress event
+  this.emitEvent( 'progress', [ this, image, elem ] );
+  if ( this.jqDeferred && this.jqDeferred.notify ) {
+    this.jqDeferred.notify( this, image );
+  }
+  // check if completed
+  if ( this.progressedCount == this.images.length ) {
+    this.complete();
+  }
+
+  if ( this.options.debug && console ) {
+    console.log( 'progress: ' + message, image, elem );
+  }
+};
+
+ImagesLoaded.prototype.complete = function() {
+  var eventName = this.hasAnyBroken ? 'fail' : 'done';
+  this.isComplete = true;
+  this.emitEvent( eventName, [ this ] );
+  this.emitEvent( 'always', [ this ] );
+  if ( this.jqDeferred ) {
+    var jqMethod = this.hasAnyBroken ? 'reject' : 'resolve';
+    this.jqDeferred[ jqMethod ]( this );
+  }
+};
+
+// --------------------------  -------------------------- //
+
+function LoadingImage( img ) {
+  this.img = img;
+}
+
+LoadingImage.prototype = Object.create( EvEmitter.prototype );
+
+LoadingImage.prototype.check = function() {
+  // If complete is true and browser supports natural sizes,
+  // try to check for image status manually.
+  var isComplete = this.getIsImageComplete();
+  if ( isComplete ) {
+    // report based on naturalWidth
+    this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
+    return;
+  }
+
+  // If none of the checks above matched, simulate loading on detached element.
+  this.proxyImage = new Image();
+  this.proxyImage.addEventListener( 'load', this );
+  this.proxyImage.addEventListener( 'error', this );
+  // bind to image as well for Firefox. #191
+  this.img.addEventListener( 'load', this );
+  this.img.addEventListener( 'error', this );
+  this.proxyImage.src = this.img.src;
+};
+
+LoadingImage.prototype.getIsImageComplete = function() {
+  // check for non-zero, non-undefined naturalWidth
+  // fixes Safari+InfiniteScroll+Masonry bug infinite-scroll#671
+  return this.img.complete && this.img.naturalWidth;
+};
+
+LoadingImage.prototype.confirm = function( isLoaded, message ) {
+  this.isLoaded = isLoaded;
+  this.emitEvent( 'progress', [ this, this.img, message ] );
+};
+
+// ----- events ----- //
+
+// trigger specified handler for event type
+LoadingImage.prototype.handleEvent = function( event ) {
+  var method = 'on' + event.type;
+  if ( this[ method ] ) {
+    this[ method ]( event );
+  }
+};
+
+LoadingImage.prototype.onload = function() {
+  this.confirm( true, 'onload' );
+  this.unbindEvents();
+};
+
+LoadingImage.prototype.onerror = function() {
+  this.confirm( false, 'onerror' );
+  this.unbindEvents();
+};
+
+LoadingImage.prototype.unbindEvents = function() {
+  this.proxyImage.removeEventListener( 'load', this );
+  this.proxyImage.removeEventListener( 'error', this );
+  this.img.removeEventListener( 'load', this );
+  this.img.removeEventListener( 'error', this );
+};
+
+// -------------------------- Background -------------------------- //
+
+function Background( url, element ) {
+  this.url = url;
+  this.element = element;
+  this.img = new Image();
+}
+
+// inherit LoadingImage prototype
+Background.prototype = Object.create( LoadingImage.prototype );
+
+Background.prototype.check = function() {
+  this.img.addEventListener( 'load', this );
+  this.img.addEventListener( 'error', this );
+  this.img.src = this.url;
+  // check if image is already complete
+  var isComplete = this.getIsImageComplete();
+  if ( isComplete ) {
+    this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
+    this.unbindEvents();
+  }
+};
+
+Background.prototype.unbindEvents = function() {
+  this.img.removeEventListener( 'load', this );
+  this.img.removeEventListener( 'error', this );
+};
+
+Background.prototype.confirm = function( isLoaded, message ) {
+  this.isLoaded = isLoaded;
+  this.emitEvent( 'progress', [ this, this.element, message ] );
+};
+
+// -------------------------- jQuery -------------------------- //
+
+ImagesLoaded.makeJQueryPlugin = function( jQuery ) {
+  jQuery = jQuery || window.jQuery;
+  if ( !jQuery ) {
+    return;
+  }
+  // set local variable
+  $ = jQuery;
+  // $().imagesLoaded()
+  $.fn.imagesLoaded = function( options, callback ) {
+    var instance = new ImagesLoaded( this, options, callback );
+    return instance.jqDeferred.promise( $(this) );
+  };
+};
+// try making plugin
+ImagesLoaded.makeJQueryPlugin();
+
+// --------------------------  -------------------------- //
+
+return ImagesLoaded;
+
+});

app/Resources/public/assets/imagesloaded/imagesloaded.pkgd.js

@@ -0,0 +1,497 @@
+/*!
+ * imagesLoaded PACKAGED v4.1.4
+ * JavaScript is all like "You images are done yet or what?"
+ * MIT License
+ */
+
+/**
+ * EvEmitter v1.1.0
+ * Lil' event emitter
+ * MIT License
+ */
+
+/* jshint unused: true, undef: true, strict: true */
+
+( function( global, factory ) {
+  // universal module definition
+  /* jshint strict: false */ /* globals define, module, window */
+  if ( typeof define == 'function' && define.amd ) {
+    // AMD - RequireJS
+    define( 'ev-emitter/ev-emitter',factory );
+  } else if ( typeof module == 'object' && module.exports ) {
+    // CommonJS - Browserify, Webpack
+    module.exports = factory();
+  } else {
+    // Browser globals
+    global.EvEmitter = factory();
+  }
+
+}( typeof window != 'undefined' ? window : this, function() {
+
+
+
+function EvEmitter() {}
+
+var proto = EvEmitter.prototype;
+
+proto.on = function( eventName, listener ) {
+  if ( !eventName || !listener ) {
+    return;
+  }
+  // set events hash
+  var events = this._events = this._events || {};
+  // set listeners array
+  var listeners = events[ eventName ] = events[ eventName ] || [];
+  // only add once
+  if ( listeners.indexOf( listener ) == -1 ) {
+    listeners.push( listener );
+  }
+
+  return this;
+};
+
+proto.once = function( eventName, listener ) {
+  if ( !eventName || !listener ) {
+    return;
+  }
+  // add event
+  this.on( eventName, listener );
+  // set once flag
+  // set onceEvents hash
+  var onceEvents = this._onceEvents = this._onceEvents || {};
+  // set onceListeners object
+  var onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || {};
+  // set flag
+  onceListeners[ listener ] = true;
+
+  return this;
+};
+
+proto.off = function( eventName, listener ) {
+  var listeners = this._events && this._events[ eventName ];
+  if ( !listeners || !listeners.length ) {
+    return;
+  }
+  var index = listeners.indexOf( listener );
+  if ( index != -1 ) {
+    listeners.splice( index, 1 );
+  }
+
+  return this;
+};
+
+proto.emitEvent = function( eventName, args ) {
+  var listeners = this._events && this._events[ eventName ];
+  if ( !listeners || !listeners.length ) {
+    return;
+  }
+  // copy over to avoid interference if .off() in listener
+  listeners = listeners.slice(0);
+  args = args || [];
+  // once stuff
+  var onceListeners = this._onceEvents && this._onceEvents[ eventName ];
+
+  for ( var i=0; i < listeners.length; i++ ) {
+    var listener = listeners[i]
+    var isOnce = onceListeners && onceListeners[ listener ];
+    if ( isOnce ) {
+      // remove listener
+      // remove before trigger to prevent recursion
+      this.off( eventName, listener );
+      // unset once flag
+      delete onceListeners[ listener ];
+    }
+    // trigger listener
+    listener.apply( this, args );
+  }
+
+  return this;
+};
+
+proto.allOff = function() {
+  delete this._events;
+  delete this._onceEvents;
+};
+
+return EvEmitter;
+
+}));
+
+/*!
+ * imagesLoaded v4.1.4
+ * JavaScript is all like "You images are done yet or what?"
+ * MIT License
+ */
+
+( function( window, factory ) { 'use strict';
+  // universal module definition
+
+  /*global define: false, module: false, require: false */
+
+  if ( typeof define == 'function' && define.amd ) {
+    // AMD
+    define( [
+      'ev-emitter/ev-emitter'
+    ], function( EvEmitter ) {
+      return factory( window, EvEmitter );
+    });
+  } else if ( typeof module == 'object' && module.exports ) {
+    // CommonJS
+    module.exports = factory(
+      window,
+      require('ev-emitter')
+    );
+  } else {
+    // browser global
+    window.imagesLoaded = factory(
+      window,
+      window.EvEmitter
+    );
+  }
+
+})( typeof window !== 'undefined' ? window : this,
+
+// --------------------------  factory -------------------------- //
+
+function factory( window, EvEmitter ) {
+
+
+
+var $ = window.jQuery;
+var console = window.console;
+
+// -------------------------- helpers -------------------------- //
+
+// extend objects
+function extend( a, b ) {
+  for ( var prop in b ) {
+    a[ prop ] = b[ prop ];
+  }
+  return a;
+}
+
+var arraySlice = Array.prototype.slice;
+
+// turn element or nodeList into an array
+function makeArray( obj ) {
+  if ( Array.isArray( obj ) ) {
+    // use object if already an array
+    return obj;
+  }
+
+  var isArrayLike = typeof obj == 'object' && typeof obj.length == 'number';
+  if ( isArrayLike ) {
+    // convert nodeList to array
+    return arraySlice.call( obj );
+  }
+
+  // array of single index
+  return [ obj ];
+}
+
+// -------------------------- imagesLoaded -------------------------- //
+
+/**
+ * @param {Array, Element, NodeList, String} elem
+ * @param {Object or Function} options - if function, use as callback
+ * @param {Function} onAlways - callback function
+ */
+function ImagesLoaded( elem, options, onAlways ) {
+  // coerce ImagesLoaded() without new, to be new ImagesLoaded()
+  if ( !( this instanceof ImagesLoaded ) ) {
+    return new ImagesLoaded( elem, options, onAlways );
+  }
+  // use elem as selector string
+  var queryElem = elem;
+  if ( typeof elem == 'string' ) {
+    queryElem = document.querySelectorAll( elem );
+  }
+  // bail if bad element
+  if ( !queryElem ) {
+    console.error( 'Bad element for imagesLoaded ' + ( queryElem || elem ) );
+    return;
+  }
+
+  this.elements = makeArray( queryElem );
+  this.options = extend( {}, this.options );
+  // shift arguments if no options set
+  if ( typeof options == 'function' ) {
+    onAlways = options;
+  } else {
+    extend( this.options, options );
+  }
+
+  if ( onAlways ) {
+    this.on( 'always', onAlways );
+  }
+
+  this.getImages();
+
+  if ( $ ) {
+    // add jQuery Deferred object
+    this.jqDeferred = new $.Deferred();
+  }
+
+  // HACK check async to allow time to bind listeners
+  setTimeout( this.check.bind( this ) );
+}
+
+ImagesLoaded.prototype = Object.create( EvEmitter.prototype );
+
+ImagesLoaded.prototype.options = {};
+
+ImagesLoaded.prototype.getImages = function() {
+  this.images = [];
+
+  // filter & find items if we have an item selector
+  this.elements.forEach( this.addElementImages, this );
+};
+
+/**
+ * @param {Node} element
+ */
+ImagesLoaded.prototype.addElementImages = function( elem ) {
+  // filter siblings
+  if ( elem.nodeName == 'IMG' ) {
+    this.addImage( elem );
+  }
+  // get background image on element
+  if ( this.options.background === true ) {
+    this.addElementBackgroundImages( elem );
+  }
+
+  // find children
+  // no non-element nodes, #143
+  var nodeType = elem.nodeType;
+  if ( !nodeType || !elementNodeTypes[ nodeType ] ) {
+    return;
+  }
+  var childImgs = elem.querySelectorAll('img');
+  // concat childElems to filterFound array
+  for ( var i=0; i < childImgs.length; i++ ) {
+    var img = childImgs[i];
+    this.addImage( img );
+  }
+
+  // get child background images
+  if ( typeof this.options.background == 'string' ) {
+    var children = elem.querySelectorAll( this.options.background );
+    for ( i=0; i < children.length; i++ ) {
+      var child = children[i];
+      this.addElementBackgroundImages( child );
+    }
+  }
+};
+
+var elementNodeTypes = {
+  1: true,
+  9: true,
+  11: true
+};
+
+ImagesLoaded.prototype.addElementBackgroundImages = function( elem ) {
+  var style = getComputedStyle( elem );
+  if ( !style ) {
+    // Firefox returns null if in a hidden iframe https://bugzil.la/548397
+    return;
+  }
+  // get url inside url("...")
+  var reURL = /url\((['"])?(.*?)\1\)/gi;
+  var matches = reURL.exec( style.backgroundImage );
+  while ( matches !== null ) {
+    var url = matches && matches[2];
+    if ( url ) {
+      this.addBackground( url, elem );
+    }
+    matches = reURL.exec( style.backgroundImage );
+  }
+};
+
+/**
+ * @param {Image} img
+ */
+ImagesLoaded.prototype.addImage = function( img ) {
+  var loadingImage = new LoadingImage( img );
+  this.images.push( loadingImage );
+};
+
+ImagesLoaded.prototype.addBackground = function( url, elem ) {
+  var background = new Background( url, elem );
+  this.images.push( background );
+};
+
+ImagesLoaded.prototype.check = function() {
+  var _this = this;
+  this.progressedCount = 0;
+  this.hasAnyBroken = false;
+  // complete if no images
+  if ( !this.images.length ) {
+    this.complete();
+    return;
+  }
+
+  function onProgress( image, elem, message ) {
+    // HACK - Chrome triggers event before object properties have changed. #83
+    setTimeout( function() {
+      _this.progress( image, elem, message );
+    });
+  }
+
+  this.images.forEach( function( loadingImage ) {
+    loadingImage.once( 'progress', onProgress );
+    loadingImage.check();
+  });
+};
+
+ImagesLoaded.prototype.progress = function( image, elem, message ) {
+  this.progressedCount++;
+  this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded;
+  // progress event
+  this.emitEvent( 'progress', [ this, image, elem ] );
+  if ( this.jqDeferred && this.jqDeferred.notify ) {
+    this.jqDeferred.notify( this, image );
+  }
+  // check if completed
+  if ( this.progressedCount == this.images.length ) {
+    this.complete();
+  }
+
+  if ( this.options.debug && console ) {
+    console.log( 'progress: ' + message, image, elem );
+  }
+};
+
+ImagesLoaded.prototype.complete = function() {
+  var eventName = this.hasAnyBroken ? 'fail' : 'done';
+  this.isComplete = true;
+  this.emitEvent( eventName, [ this ] );
+  this.emitEvent( 'always', [ this ] );
+  if ( this.jqDeferred ) {
+    var jqMethod = this.hasAnyBroken ? 'reject' : 'resolve';
+    this.jqDeferred[ jqMethod ]( this );
+  }
+};
+
+// --------------------------  -------------------------- //
+
+function LoadingImage( img ) {
+  this.img = img;
+}
+
+LoadingImage.prototype = Object.create( EvEmitter.prototype );
+
+LoadingImage.prototype.check = function() {
+  // If complete is true and browser supports natural sizes,
+  // try to check for image status manually.
+  var isComplete = this.getIsImageComplete();
+  if ( isComplete ) {
+    // report based on naturalWidth
+    this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
+    return;
+  }
+
+  // If none of the checks above matched, simulate loading on detached element.
+  this.proxyImage = new Image();
+  this.proxyImage.addEventListener( 'load', this );
+  this.proxyImage.addEventListener( 'error', this );
+  // bind to image as well for Firefox. #191
+  this.img.addEventListener( 'load', this );
+  this.img.addEventListener( 'error', this );
+  this.proxyImage.src = this.img.src;
+};
+
+LoadingImage.prototype.getIsImageComplete = function() {
+  // check for non-zero, non-undefined naturalWidth
+  // fixes Safari+InfiniteScroll+Masonry bug infinite-scroll#671
+  return this.img.complete && this.img.naturalWidth;
+};
+
+LoadingImage.prototype.confirm = function( isLoaded, message ) {
+  this.isLoaded = isLoaded;
+  this.emitEvent( 'progress', [ this, this.img, message ] );
+};
+
+// ----- events ----- //
+
+// trigger specified handler for event type
+LoadingImage.prototype.handleEvent = function( event ) {
+  var method = 'on' + event.type;
+  if ( this[ method ] ) {
+    this[ method ]( event );
+  }
+};
+
+LoadingImage.prototype.onload = function() {
+  this.confirm( true, 'onload' );
+  this.unbindEvents();
+};
+
+LoadingImage.prototype.onerror = function() {
+  this.confirm( false, 'onerror' );
+  this.unbindEvents();
+};
+
+LoadingImage.prototype.unbindEvents = function() {
+  this.proxyImage.removeEventListener( 'load', this );
+  this.proxyImage.removeEventListener( 'error', this );
+  this.img.removeEventListener( 'load', this );
+  this.img.removeEventListener( 'error', this );
+};
+
+// -------------------------- Background -------------------------- //
+
+function Background( url, element ) {
+  this.url = url;
+  this.element = element;
+  this.img = new Image();
+}
+
+// inherit LoadingImage prototype
+Background.prototype = Object.create( LoadingImage.prototype );
+
+Background.prototype.check = function() {
+  this.img.addEventListener( 'load', this );
+  this.img.addEventListener( 'error', this );
+  this.img.src = this.url;
+  // check if image is already complete
+  var isComplete = this.getIsImageComplete();
+  if ( isComplete ) {
+    this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
+    this.unbindEvents();
+  }
+};
+
+Background.prototype.unbindEvents = function() {
+  this.img.removeEventListener( 'load', this );
+  this.img.removeEventListener( 'error', this );
+};
+
+Background.prototype.confirm = function( isLoaded, message ) {
+  this.isLoaded = isLoaded;
+  this.emitEvent( 'progress', [ this, this.element, message ] );
+};
+
+// -------------------------- jQuery -------------------------- //
+
+ImagesLoaded.makeJQueryPlugin = function( jQuery ) {
+  jQuery = jQuery || window.jQuery;
+  if ( !jQuery ) {
+    return;
+  }
+  // set local variable
+  $ = jQuery;
+  // $().imagesLoaded()
+  $.fn.imagesLoaded = function( options, callback ) {
+    var instance = new ImagesLoaded( this, options, callback );
+    return instance.jqDeferred.promise( $(this) );
+  };
+};
+// try making plugin
+ImagesLoaded.makeJQueryPlugin();
+
+// --------------------------  -------------------------- //
+
+return ImagesLoaded;
+
+});
+