title: Using Keycode with CKeditor
body: <p>I wanted to get the keyCode on <code>keydown</code> event in ckeditor. My code looks somewhat like this:</p>
  <pre><code>    editor.document.on( 'keydown', function(event) {
     var keycode= event.data.keyCode &amp; ~(CKEDITOR.SHIFT | CKEDITOR.CTRL |CKEDITOR.ALT);
    alert('Key:'+keycode);
    
  });
  </code></pre>
  <p>But it always alerts 0. Can't figure why is it so.?</p>
  <p>Also I wanted to use <code>event.preventDefault()</code> from jQuery, but I can't figure out how to include jQuery library in my plugin.js file. Any suggestions?</p>