Initial attempt, before testing
*	modified:   scanmon.py
Added logic to exit gracefully. cmdin thread is abandoned
*	modified:   scanner/__init__.py
Switched to using pyserial to achieve timeout on reads.
Merge branch 'serial' into dev

* serial:
  *	modified:   scanmon.py Added logic to exit gracefully. cmdin thread is abandoned *	modified:   scanner/__init__.py Switched to using pyserial to achieve timeout on reads.
  Initial attempt, before testing
Skeleton for response formatters