digitalWriteAllPins add __init__.py
Merge pull request #59 from ks156/next

Added a better support for serial communication
Added serial example for python
Merge pull request #57 from manuIO/next

Thanks
Increased SFP receive buffer size
Currently SFP does not parse partial binary SFP messages, so a system
may not work with large messages.
(from upstream f18f705 by GiedriusM)