- hdlc-framing renamed to hdlc-framing-v2
- added hdlc-framing-v1 for support older version of HDLC
  stuffing protocol
- simply-network-serial renamed to simply-network-serial-v2
- added simply-network-serial-v1 for support older version
  of HDLC stuffing protocol
- updated examples projects accodring to upper mentioned changes

ATTENTION: hdlc-framing-v1 does not contain older version of HDC stuffing
protocol. Will be reimplemented !!!
- .gitignore updated according to last changes