title: package android.support.v4.app does not exist ; in Android studio 0.8
body: <p>I've recently updated the android studio IDE to 0.8 to work with the new android L SDK. To start I imported a finished android project that receives no errors in the older version of android studio. In version 0.8 i lines such as</p>
  
  <p><code>import android.support.v4.app.Fragment;
  </code><br>
  get: Support cannot be resolved causing the rest of the code to have errors. The logcat returns 101 instances of </p>
  
  <pre><code>Error:(8, 30) error: package android.support.v4.app does not exist
  </code></pre>
  
  <p>1 for each time I call the support library in an import statement.</p>
  
  <p>I've tried</p>
  
  <ul>
  <li>reinstalling the IDE</li>
  <li>deleting contents of idea folder</li>
  <li>re installing all the SDK's - including the support libraries </li>
  <li>syncing the gradle</li>
  <li>copying the support library into the libs folder manually</li>
  <li>rebuilding the project </li>
  <li>as well as creating a new project to test the library </li>
  </ul>
  
  <p>not entirely sure what's left to do.</p>