Removed Update Method as it overwrites the Eloquent Update method

Fix issue with Update not working on an eloquent model.

Calling $model->update($data) no longer works after this code was added.
$model->fill($data)->save() still works.

Conflicts with the Eloquent default update function:
http://laravel.com/api/source-class-Illuminate.Database.Eloquent.Model.html#946

Needs to fill the model with the data passed before calling $this->save().