title: Loading lib from plugin - cakephp
body: <p>I have a plugin and inside the plugin I have a Lib folder.
  Like this:</p>
  
  <p><code>Lib/Billing/CMS/CMS.php</code></p>
  
  <p>How can I use the CMS class inside <code>CMS.php</code> on my controller? Not my plugin controller, but a controller on my application.</p>
  
  <p>EDIT: Cake version is 2.3</p>