--Logging functional for pan/tilt, motor, and camera commands. Text files saved to ~/vader-rover/logs/.  GMT timestamps come from seykhl, while timestamps in seconds.microseconds come from rover (except for the final 'Logging completed' timestamp--has to come from seykhl b/c shutdown routine uses the socket closing from seykhl side as the notification to rover to stop logging.
--Bump switch monitor functions integrated into emperor.cpp (as separate thread) on rover.  Bump switch messages logged on seykhl.