title: jquery click event not triggered in ons-back-button in onsenui
body: <p>With the latest version of Onsen v1.3.8, I couldn't write specific jquery click events for <code>ons-back-button</code> like below.</p>
  
  <pre><code>$(document).on('click', 'ons-back-button', function(e){
  alert('clicked');
  });
  </code></pre>
  
  <p>But, with the older versions like <code>/* onsenui - v1.2.1 - 2014-12-01 */</code>   jquery click events are triggered. </p>
  
  <p>Using latest version <code>/*! onsenui - v1.3.8 - 2015-07-27 */</code>  (onsenui_all.js or onsenui.js), jquery click events not triggered specifically for <code>ons-back-button</code>!</p>
  
  <p><code>ons-button</code>, <code>ons-list</code> jquery click events are triggering with the latest versions.</p>
  
  <p><strong>Edit:</strong></p>
  
  <p><code>ng-click</code> event also not triggered</p>
  
  <pre><code>&lt;ons-back-button ng-click="onsPay()"&gt;&lt;/ons-back-button&gt;
  
  function onsPay()
  {
   console.log("Clicked");
  }
  </code></pre>
  
  <p>Any help on this?</p>