title: Select2 Options different from value that is returned
body: <p>I have a set of objects (in JSON form) that have an ID and description.  </p>
  
  <p>I need the user to be able to see at the ID or description in the drop down menu, but when they select the ID or description, the object's ID must be returned.</p>
  
  <p>An object looks something like this:</p>
  
  <pre><code>{
  "id": 100
  "name": "George Washington"
  "description": "The first president of the United States."
  }
  </code></pre>
  
  <p>In the drop-down menu, I want both <code>100</code> and <code>George Washington</code> to appear.  When the user selects either of these, I want to return <code>100</code>.  Any thoughts on how to implement this behavior? </p>