title: Add additional link to jquery ui autocomplete list
body: <p>Sorry I couldn't find a clear solution on how to do this.
  I'm using jQuery UI autocomplete on a <code>textbox</code> that retrieves data from a database.
  I need to add an "Add new Venue" link to the end of the list.  I want to allow users to add a new venue, if the venue they're looking for is not already in the database.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>$(function() {
      $("#venue").autocomplete({
          source: '&lt;?php echo base_url();?&gt;index.php/home/autocomplete_venue',
          minLength: 2,
          select: function(event, ui) {
              $('#venue_id').val(ui.item.id);                 
          }
      });
  });
  </code></pre>