move lib assets to vendor directory

app/assets/javascripts/application.js

@@ -5,7 +5,10 @@
 // the compiled file.
 //
 //= require jquery
+//= require jquery-ui
 //= require jquery_ujs
+//= require jquery.ui.selectmenu
+//= require jquery.cookie
 //= require_tree .
 
 $(function(){

app/assets/stylesheets/application.css

@@ -2,6 +2,8 @@
  * This is a manifest file that'll automatically include all the stylesheets available in this directory
  * and any sub-directories. You're free to add application-wide styles to this file and they'll appear at
  * the top of the compiled file, but it's generally better to create a new file per style scope.
+ *= require jquery-ui/jquery-ui
+ *= require jquery-ui/jquery.ui.selectmenu
  *= require_self
  *= require_tree .
 */