title: Angular expression in attribute
body: <p>I have a page using angular where im implementing popover from bootstrap:</p>
  
  <pre><code>&lt;img class="state-msg" data-toggle="popover" ng-popover data-content="{{item.status.message}}" data-trigger="hover" data-placement="top" ng-src="{{item.status.stateIcon}}"/&gt;
  </code></pre>
  
  <p>The data-content doesnt get rendered correctly. It returns literaly {{item.status.message}} instead of the value of message.</p>
  
  <p>Does angular have an issue w expressions in 'data-' attributes?</p>
  
  <p>Tnx</p>