Fixed multi-thread message window bug, mainwindow should not hang any more on message windows from comm threads

Fixed initial startup bugs, cleaned up the activation-deactivation of update timers. Added initial instructions for new users.

Significantly bugfixed persistence and link adding/removal. Not yet fully there, but getting closer to release

First semi-usable version with new menu layout based on autopilot. Still very experimental. Current Bug: Linecharts do not work. Need to find out why

Still working on having independent builds for each MAV, most of the work is done, only Central Widgets remain to be instantiated and menu-controlled based on the autopilot

VERY EXPERIMENTAL. Saving of location for the common widgets now working and persisted across sessions. Needs to be extended to the individual autopilot widgets

VERY UNSTABLE. Working on changing the way widgets are constructed and shown now based on the Detected autopilot. The basic scaffolding is in place still needs a lot of work.

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.

separation of the view of the local operator of the view of the global operator adding the view of global operator.
add the functionality to draw a waypoints on the map when they are generated from widget waypointlist.

Cleaned up and commented major code parts. Refactoring HDD and HSI widgets to support QGraphicsView drag-and-drop, tested multi-MAV support more intensely, currently adding the system coloring to all widgets

Significantly improved plotting, now capturing data in linechart allows limmediate processing / analysis of the whole flight

Major cleanup of MainWindow constructor. All widgets have now the visible property set to false on its constructor