Initial version of AVR-MCU FW.
Supports Signature and Led control only
Initial version of BTCAR DBG package:
 - btcar-dbg          - VS solution I.e. compilation of all required projects
 - btcar-dbg-cmd-lib  - Debug command library
 - btcar-dbg-cmd-proc - Debug command UI
 - btcar-dbg-io-proc  - Debug command I/O processing. Interface between UI and MCU
 - cmd_line_wc        - just a command line library. Used by btcar-dbg-cmd-proc