Merge branch '2.0-wip' of github.com:twitter/bootstrap into 2.0-wip

Conflicts:
	docs/assets/bootstrap.zip
	less/responsive.less

docs/assets/css/bootstrap-responsive.css

+/*!
+ * Bootstrap Responsive v2.0.0
+ *
+ * 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.
+ */
 .hidden {
   display: none;
   visibility: hidden;

js/bootstrap-collapse.js

@@ -71,7 +71,7 @@
 
       this.$element
         .removeClass('collapse')
-        [dimension](size || '')
+        [dimension](size || 'auto')
         [0].offsetWidth
 
       this.$element.addClass('collapse')

less/responsive.less

+/*!
+ * Bootstrap Responsive v2.0.0
+ *
+ * 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.
+ */
+
 // Responsive.less
 // For phone and tablet devices
 // -------------------------------------------------------------