Update Twitter Bootstrap upto v3.1.1.

_assets/vendor/bootstrap/js/scrollspy.js

@@ -1,24 +1,14 @@
 /* ========================================================================
- * Bootstrap: scrollspy.js v3.0.3
+ * Bootstrap: scrollspy.js v3.1.1
  * http://getbootstrap.com/javascript/#scrollspy
  * ========================================================================
- * 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';
 
   // SCROLLSPY CLASS DEFINITION
   // ==========================
@@ -58,10 +48,11 @@
       .map(function () {
         var $el   = $(this)
         var href  = $el.data('target') || $el.attr('href')
-        var $href = /^#\w/.test(href) && $(href)
+        var $href = /^#./.test(href) && $(href)
 
         return ($href
           && $href.length
+          && $href.is(':visible')
           && [[ $href[offsetMethod]().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href ]]) || null
       })
       .sort(function (a, b) { return a[0] - b[0] })
@@ -84,6 +75,10 @@
       return activeTarget != (i = targets.last()[0]) && this.activate(i)
     }
 
+    if (activeTarget && scrollTop <= offsets[0]) {
+      return activeTarget != (i = targets[0]) && this.activate(i)
+    }
+
     for (i = offsets.length; i--;) {
       activeTarget != targets[i]
         && scrollTop >= offsets[i]
@@ -96,18 +91,18 @@
     this.activeTarget = target
 
     $(this.selector)
-      .parents('.active')
+      .parentsUntil(this.options.target, '.active')
       .removeClass('active')
 
-    var selector = this.selector
-      + '[data-target="' + target + '"],'
-      + this.selector + '[href="' + target + '"]'
+    var selector = this.selector +
+        '[data-target="' + target + '"],' +
+        this.selector + '[href="' + target + '"]'
 
     var active = $(selector)
       .parents('li')
       .addClass('active')
 
-    if (active.parent('.dropdown-menu').length)  {
+    if (active.parent('.dropdown-menu').length) {
       active = active
         .closest('li.dropdown')
         .addClass('active')