Fix bug when dealing with post request (request was not initialized)
ResultStream is now stored in RESTRequest in HttpRequestHandler
Fixed NullPointerException when calling getResultStream() when request's result stream is null
RequestListeners now holds a reference to the RESTRequest
Fix bug in Processor checkRequest when resource's result code is 200 but request not resend
Fix bug in Processor checkRequest when resource's result code is 200 but request not resend
Update documentation
Update README and CHANGELOG
Alpha release 0.7.2 : check CHANGELOG for details