BTCAR-DBG: Fully reworked.
   - UI is a completly standalone module. Trying to connect to the one of
     predefined IO pipe.
   - IO Set of files are common for all types of BTCAR-DBGs (CSR, AVRF,
     AVRB). Should be copiled together with IF specifc files.
   - IO-CSR debug IO to connect to CSR
   - IO-AVRB debug IO to AVR MCU back-door IF