title: Symfony2 how to change bundle format once the bundle is generated?
body: <p>If you generated a bundle using the command line is it possible to change the format?</p>
  
  <p>There are 4 formats if I am correct.</p>
  
  <ul>
  <li>yml</li>
  <li>annotation</li>
  <li>php</li>
  <li>xml</li>
  </ul>
  
  <p>For example I generated the bundle when following the tutorial. However I mistakenly picked the default annotation format while I should have chosen the yml format.</p>