title: angular-translate not working with ui-grid and angular 1.5.5
body: <p>I am using:
  angular-translate@2.6.0
  ui-grid@3.0.1
  angular@1.5.5</p>
  
  <pre><code>$scope.changeLanguage = function (langKey) {
   $translate.use(langKey);
  };
  </code></pre>
  
  <p>$translate.use(langKey); function will not translate my ui-grid cells. However when I will switch to angular@1.2.28 translate function is working. I cannot downgrade angular to 1.2.28 because other things will stop working.</p>
  
  <p>here is plunkr example:
  <a href="http://plnkr.co/edit/UUFr1sN3uXjnnPGfFkdO?p=preview" rel="nofollow">http://plnkr.co/edit/UUFr1sN3uXjnnPGfFkdO?p=preview</a></p>
  
  <p>can anyone help?
  thanks</p>