42.2: Updated Google Billing library.
42.1: If timer running when new session started, re-start the timer after resetting it. Fixed two bugs related to the GDA2020 datum.
42.0: Allow current bearing to be copied to clipboard when long pressing on compass page. Moved Goto and Grid-ref buttons on main page for consistency.
41.7: Fixed KML import issues.
41.5: Added options to show grid lines and tracklog grid cell coverage on map.