Ardupilot support, builds now cleanly on Windows. Fixed a bug where the application could crash if no system was connected.

Still need to add uas connections. New osgwidget inherits from
qgraphicsview to expose more functionality to qt. Map3d.ui contains
the graphics view and some buttons. Currently runs yahoo_heightfield
by default. Make sure you run qgroundcontrol fromt the top dir or
it will seg fault, :-). I'll add some error handling soon.

Working on QGraphicsView-based local waypoints interface supporting drag-and-drop, commented code, fixed Google Maps interface, added mouse and SpinBox zoom to HSIWidget, fixed MAV-based coloring and stylesheets - MEGA COMMIT

Fixed Audio output on Linux, works now with systems flite version. Introduced two new alarm/notify sounds

Pushed parameter interface forward, now receiving of onboard params works, working on display and writing

This commit and the previous merge attempts to align my tree with upstream changes. It works for me but apologies in advance if i break anything