Merge pull request #20 from QuantumCD/HUD

Various GUI Improvements
Fixes error #21

Fixed window geometry error caused by QQuick2 component.
Fixed bug #22 and misc. changes

Fixed bug #22 according to http://qt-project.org/forums/viewthread/9043
Added dive timer resets to activity monitor.
Depth tape now shows the proper units.
Fix for #23

Maximize button now works fine.