AFNetworking/AFUrbanAirshipClient — pull request #1 by 0xced (2012-12-12 15:06:26+00:00)
Title: Make sure that the success block is called if the device token registration succeeded

Using the `AFJSONRequestOperation` class with `Accept: application/json` header would call the failure block instead of the success block even though the device token registration was successful because Urban Airship responds with `text/plain` content type. Please see the lengthy commit messages for more information.