Send MQTT events from RDTech TC66C device

Tested with Joy-IT TC66C.

RDTech TC66C hardware info at sigrok:

• https://sigrok.org/wiki/RDTech_TC66C

Clone the sources and just call the CLI to create a Python Virtualenv, e.g.:

~$ git clone https://github.com/jedie/tc66c2mqtt.git
~$ cd tc66c2mqtt
~/tc66c2mqtt$ ./cli.py --help

test print data in terminal looks like: