Update Twitter Bootstrap upto v3.1.1.

_assets/vendor/bootstrap/js/collapse.js

@@ -1,24 +1,14 @@
 /* ========================================================================
- * Bootstrap: collapse.js v3.0.3
+ * Bootstrap: collapse.js v3.1.1
  * http://getbootstrap.com/javascript/#collapse
  * ========================================================================
- * Copyright 2013 Twitter, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2011-2014 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  * ======================================================================== */
 
 
-+function ($) { "use strict";
++function ($) {
+  'use strict';
 
   // COLLAPSE PUBLIC CLASS DEFINITION
   // ================================
@@ -69,7 +59,7 @@
     var complete = function () {
       this.$element
         .removeClass('collapsing')
-        .addClass('in')
+        .addClass('collapse in')
         [dimension]('auto')
       this.transitioning = 0
       this.$element.trigger('shown.bs.collapse')
@@ -137,6 +127,7 @@
       var data    = $this.data('bs.collapse')
       var options = $.extend({}, Collapse.DEFAULTS, $this.data(), typeof option == 'object' && option)
 
+      if (!data && options.toggle && option == 'show') option = !option
       if (!data) $this.data('bs.collapse', (data = new Collapse(this, options)))
       if (typeof option == 'string') data[option]()
     })