title: Rails 4 Assets are not compiling in production environment
body: <p>My app is running in dev environment. I am using JQCloud.
  Its working fine in development mode but when i run following command</p>
  
  <pre><code>RAILS_ENV=production rake assets:precompile
  </code></pre>
  
  <p>All assets precompile but after running my server in production mode i am getting following error.</p>
  
  <pre><code>jQCloud is not a function
  
  
  application.css.scss
  
   *= require_tree .
   *= require_self
   *= require font-awesome
   */
  
  
  appication.js
  
  //= require jquery
  //= require jquery_ujs
  //= require bootstrap-sprockets
  //= require_tree .
  </code></pre>
  
  <p>dashing widegts index.js</p>
  
  <pre><code>//= require_tree .
  //= require highcharts/highstock
  //= require highcharts/highcharts-more
  //= require highcharts/modules/exporting
  //= require jquery-ui
  //= require jqcloud
  </code></pre>
  
  <p>Facing error following errors</p>
  
  <pre><code>Uncaught TypeError: $(...).jQCloud is not a function 
  Uncaught ReferenceError: Highcharts is not defined
  </code></pre>