title: Apply function inside bindAttr
body: <p>I need to apply a function to the property value. I use following code to bind it with an inputbox.</p>
  
  <pre><code>{{bindAttr value="ticket.t_date"}}
  </code></pre>
  
  <p>I have a helper function as follow</p>
  
  <pre><code>Ember.Handlebars.helper('date', function(unixDate){ return unixToDate(unixDate); });
  </code></pre>
  
  <p>I need to use this function inside bindAttr.</p>