title: select2 not working with tags
body: <p>I can't get select2 to work with tags, despite copying the code that is provided exactly in the <a href="http://ivaynberg.github.io/select2/#documentation" rel="nofollow">documentation</a>. Here is a basic jsfiddle with select2 that is functional: <a href="http://jsfiddle.net/Gh4Ac/" rel="nofollow">http://jsfiddle.net/Gh4Ac/</a></p>
  
  <p>Now the only thing I change in this new example is <code>$("#e2").select2();</code> to <code>$("#e2").select2({tags:["red", "green", "blue"]});</code>. Here is the result: <a href="http://jsfiddle.net/Gh4Ac/1/" rel="nofollow">http://jsfiddle.net/Gh4Ac/1/</a></p>
  
  <p>Notice that the first example works, but the second doesn't. Can someone please explain how to get tags to work for select2?</p>