Fix an issue with originalData. In fact, the response was unwrap before to be deserialized. So, we already modify the response when we execute the RailsResource.deserialize function.
Instead of modify the root response, just add 'originalData' to the response on the beforeResponse event.
Merge pull request #103 from Ditchou/fix-original-data

Original data was not the server response when we use the option fullResponse