title: AngularFire binding to scope vs $bindTo?
body: <p>In angular fire <a href="https://www.firebase.com/docs/web/libraries/angular/api.html" rel="nofollow">documentation</a>, here are the two line I am trying to understand:</p>
  
  <pre><code> // To make the data available in the DOM, assign it to $scope
       $scope.data = obj;
  
   // For three-way data bindings, bind it to the scope instead
       obj.$bindTo($scope, "data");
  </code></pre>
  
  <p>Are they doing the same thing? Do both bind to scope for 3 way data binding?</p>