title: Ionic - AngularJS : ion-toggle doesn't update the model
body: <p>I have a strange issue with the ion-toggle directive in Ionic framework.</p>
  
  <p>When using ion-toggle like this :</p>
  
  <pre><code>&lt;ion-toggle ng-model="testToggle"&gt;Test toggle&lt;/ion-toggle&gt;
  </code></pre>
  
  <p>JS:</p>
  
  <pre><code>$scope.$watch('testToggle',function(value) {
      console.log('testToggle changed to '+value);
  })
  </code></pre>
  
  <p>The controller doesn't receive any update at all.</p>
  
  <p>Here's the CodePen :
  <a href="http://codepen.io/anon/pen/jPOMqz" rel="nofollow">http://codepen.io/anon/pen/jPOMqz</a></p>
  
  <p>You'll see that i've added an $interval that changes a binded variable to random in order to see that everything else works as expected</p>
  
  <p>Thank you very much :)</p>