Summary: @public
RCTNetworking currently relies on network responses to include an accurate text encoding, otherwise it is unable to convert the response data to text unless it's encoded as UTF8.
See: https://github.com/facebook/react-native/issues/1780#issuecomment-139334294 for details.
This diff makes use of a new feature in iOS8 to detect the encoding of the text authomatically
Reviewed By: @sahrens
Differential Revision: D2443446