various updates from 2013-12-03

added initBools() function
added getSerial debug with calling function
fixed timeout in runBioimpedance
added new commands (1) ABORT works anywhere in program and backs out a
level, (2) RESET will reset all flags and re-do atmo init, (3)
checkAtmoCal will respond true or false if initAtmosphere() runs
successfully, (4) PCReady responds with ArduinoReady if running in the
main loop awaiting commands.