title: model saving but success and error callbacks not executing
body: <p>I save a backbone model, the save is successful.  However the success or the error function dont seem to be getting called.  Here is what I have tried :</p>
  
  <pre><code>that.model.save(null,{
      success:function(model, response){
          console.log("save successful");
      },
      error: function(model, response){
         console.log("save error");
      }
  });
  </code></pre>