add a preference setting to export compass heading in the gpx file (non functional yet)
compass heading is now being logged to the database (cleanup and testing needed)
compass heading is now also being logged in the track
export of compass heading to gpx implemented
adjust MockData to the new calls of track and wayPoint
onGpsStatusChanged now uses satellites that are used in fix for the bar graph, and disables buttons if there is no fix (0 satelites)
onGpsStatusChanged also updates the accuracy text box when there is no fix
Satellites are displayed in accuracy text box (used/visible)
Add a compass heading display to the Logger activity
compas now uses TYPE_COMPASS sensor since it provides meaningful accuracy info and has no problems when the phone is lying.
start editable waypoints (work in progress)