CRAAG2: Revert to sane GPS poll logic.
CRAAG2: Use extra digit of GPS precision, kludge correct rounding.
CRAAG2: Kludge correct rounding on altitude.
CRAAG2: Use known length function for gps poll.
CRAAG2: Remove debug gpscount var.
CRAAG2: Increase baudrate to 19200, set GPS update rate to 5hz.
CRAAG2: Remove un-needed polling delays.
CRAAG2: Add ground speed, heading and descent rate telemetry.
CRAAG2: Give GPS more time to get a lock on initial boot.
CRAAG2: Divide heading by 10, no need for decimal accuracy.