title: Sorting a query by a ListProperty (NDB)
body: <p>How do i sort a query by a ListProperty*?</p>
  
  <p>the Model:</p>
  
  <pre><code>class Chapter(ndb.Model):
      title = ndb.StringProperty(required=True)
      version = ndb.IntegerProperty(repeated=True)
  </code></pre>
  
  <p>the 'version' stores values like: </p>
  
  <pre><code>1.1 -&gt; [1,1]
  1 -&gt; [1]
  2.1.1.1.1 -&gt; [2,1,1,1,1]
  1.2 -&gt; [1,2]
  2.1.2 -&gt; [2,1,2]
  </code></pre>
  
  <p>I want to order it like:</p>
  
  <pre><code>1
  1.1
  1.2
  2.1.1.1.1
  2.1.2
  </code></pre>
  
  <p>*Im using NDB so, ListProperty = ndb.IntegerProperty(repeated=True)</p>