title: cakephp how to have a controller class that other controllers extend
body: <p>I want a ThingsController that extends AppController.  My individual controllers will extend ThingsController.  The functions are repetitive for each model, and each model has its own mainly redundant controller.</p>
  
  <p>A) Is this a good idea?</p>
  
  <p>B) How do I do it?  I tried adding it to the controllers directory, but cake did not find it.</p>
  
  <p>c) How should I code in beforeFilter and beforeRender?  That includes Auth.  </p>