Pymodbus 1.5.0 Pre release

• Improve transaction speeds for sync clients (RTU/ASCII), now retry on empty happens only when retry_on_empty kwarg is passed to client during intialization
  client = Client(..., retry_on_empty=True)

• Fix tcp servers (sync/async) not processing requests with transaction id > 255

• Introduce new api to check if the received response is an error or not (response.isError())

• Move timing logic to framers so that irrespective of client, correct timing logics are followed.

• Move framers from transaction.py to respective modules

• Fix modbus payload builder and decoder

• Async servers can now have an option to defer reactor.run() when using Start<Tcp/Serial/Udo>Server(...,defer_reactor_run=True)

• Fix UDP client issue while handling MEI messages (ReadDeviceInformationRequest)

• Fix Misc examples

• Source dist (tar.gz) is now available in PyPI as well.