Retune visualglide engine
	modified:   DoNearest.cpp
	modified:   ../Draw/Multimaps/GetVisualGlidePoints.cpp
Disable debug mode in VG
Update changes and manual for VGE
Draw Bearing line to destination also for M4
	modified:   TopView.cpp
Fix simulator PC keys changing altitude by 45m instead of 50feet when using feet units.
Fix simulator PC key not fast forwarding if ground speed is zero
Update changes
	modified:   MapWndProc.cpp
	modified:   ../LKSimulator.cpp
Do not alert for missing safety altitude if using CAR TREK MODE
	modified:   LKDrawWelcome.cpp
Update changes and this is version 3.1O
Advance to version 3.1p0