title: Add image to collapsable content header
body: <p>I'm following the collapsible content doc at - 
  <a href="http://jquerymobile.com/demos/1.0a4.1/docs/content/content-collapsible.html" rel="nofollow">http://jquerymobile.com/demos/1.0a4.1/docs/content/content-collapsible.html</a></p>
  
  <p>Is there a method of adding an image to the right, within the header field (in code below the header field is referenced by 'Test').</p>
  
  <pre><code>&lt;div data-role="collapsible" data-collapsed="true"&gt;
          &lt;h3&gt;Test&lt;/h3&gt;&lt;add image here&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p>I can't seem to find anything in the docs.</p>
  
  <p>Thanks for any help</p>