Changelog:
==========
- new framer concept (utility class instead of direct)
- new much simpler transactionManager
- trace methods to trace/modify incoming/outgoing byte streams as well as PDUs
- Convert endianness
- Fix sync serial client, loop.
- Correct future.
- Correct #2501
- Raise exception on no response in async client.
- re-instatiate Future on reconnect
- Remove all trailing zeroes during string decoding
- Fix too many sync client log messages.
- Asyncio future removed from sync client.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>