title: Merge two Record Arrays
body: <p>I have two different models in my application</p>
  
  <pre><code>App.Foo = DS.Model.extend({
    title:   DS.attr('string')
  });
  
  App.Bar = DS.Model.extend({
    title:   DS.attr('string')
  });
  </code></pre>
  
  <p>Both foo and bar models get their data from different models in my backend.<br>
  They both have some common fields, like title. But others are also different (and I will need different views for them).</p>
  
  <p>However, when displaying a list of them, I would like to be able to merge them and order them as if they were the same object.</p>
  
  <p>Unfortunately from what I see in the ember-data codebase, that doesn't seem to be possible.<br>
  Any idea on solutions ?</p>