title: Get list of all twig templates Symfony
body: <p>I search for a method to get the list of all twig templates in my Symfony2 project.
  I hope to get a result like this : </p>
  
  <pre><code>- AcmeBundle:Default:list.html.twig 
  - OtherBundle:ParentFolder:new.html.twig
  </code></pre>
  
  <p>Do you have any idea?</p>
  
  <p>Thanks.</p>