Adding Angular and dependent packages for testing

third_party/pkg/route_hierarchical/example/full/css/bootstrap.css

 /*!
- * Bootstrap v2.3.2
+ * Bootstrap v2.3.1
  *
  * Copyright 2012 Twitter, Inc
  * Licensed under the Apache License v2.0
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
  */
 
 .clearfix {
   *zoom: 1;
@@ skipping 2989 matching lines @@
 }
 
 .open {
   *z-index: 1000;
 }
 
 .open > .dropdown-menu {
   display: block;
 }
 
-.dropdown-backdrop {
-  position: fixed;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  z-index: 990;
-}
-
 .pull-right > .dropdown-menu {
   right: 0;
   left: auto;
 }
 
 .dropup .caret,
 .navbar-fixed-bottom .dropdown .caret {
   border-top: 0;
   border-bottom: 4px solid #000000;
   content: "";
@@ skipping 3127 matching lines @@
   display: block;
 }
 
 .invisible {
   visibility: hidden;
 }
 
 .affix {
   position: fixed;
 }