AntennaTracker: Added supportfor manual control message to force antenna bearing and pitch in manual mode
AntennaTracker: minor cleanups in tracker.pde
AntennaTracker: remove call to set fly forward, else if the tracker is moving it will use the GPS direction for yaw instead of the compass
AntennaTracker: initial position was not being set on normal startup
AntennaTracker: added documentation about compass calibration to AntennaTracker.txt
AntennaTracker: update_GPS now sets HOME position and compass.set_initial_location on first good GPS fix
Plane: changed version to 2.79beta1