Added separation to servos for arm/motor control
Renamed some vars in bluetooth.h
Added a pragma platform to logging.h

The code in the logging.h header is platform-dependent, so it now has a
pragma to denote the dependence
Added pragma platform, max bt msg size to nxt_ctrl
Renamed variables for clarity in bluetooth.h
Cleaned up nxt_control.c a bit
Merge branch 'master' of github.com:vernonrj/robotics-kinect