Fix AFHTTPBodyPart's read:maxLength: method to no longer treat a negative response from -[NSInputStream hasBytesAvailable] as an indication that the stream has come to an end, and instead examine the stream's state.
Merge branch 'master' of https://github.com/xtreme-brian-croom/AFNetworking into xtreme-brian-croom-master
Refactoring upload input stream test and AFBufferedInputStreamProvider class