title: $http.get and $templateCache
body: <p>Could someone explain to me the following code:</p>
  
  <pre><code>$http.get('./template.html', {
      cache: $templateCache
  }).then (function(response){
    console.log(response.data);
  });
  </code></pre>
  
  <p>I understand <code>response.data</code> will be equal to the whole content of template.html, however what about the object</p>
  
  <pre><code>{cache: $templateCache}
  </code></pre>
  
  <p><strong>What does it do?</strong></p>