title: Angular: "tab" keycode event not firing
body: <p>I have a form field with a handler that I want to trigger after the user deliberately accepts the value with either <code>return/enter</code> or tabs to the next field.  I can't use onBlur in this case, since it of course triggers if the user or system blur the field.  I only want it on a keyup.</p>
  
  <p>So I have this.  I had the <code>enter</code> first, and it works great. But the <code>keycode==9</code> does not trigger the handler.  The focus merely moves to the next field.  </p>
  
  <pre><code>ng-keyup="($event.keyCode == 13 || 
             $event.keyCode == 9) 
             &amp;&amp; packages.submitNumber('add', packages.addTrackingNumber)"
  </code></pre>
  
  <p>Is there a way to have this fire on <code>enter</code> OR <code>tab</code>?</p>