title: AngularJS setting a default thumbnail on ng-thumb
body: <p>Currently trying to learn AngularJS, I am playing around with image upload functions and using ng-thumb to preview the image file being uploaded. What I am trying to do right now is set the ng-thumb to show a default image and have that image be overriden when a new image is uploaded.  </p>
  
  <pre><code>&lt;div class="row-fluid col-md-12 text-center" ng-repeat="item in uploader.queue"&gt;
       &lt;div ng-thumb="{ file: item._file, height: 200, width: 300}"&gt;&lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Is there a way to set a default image for ng-thumb? Thanks for your help.</p>