Added command to select target position for robot - command can be accessed via a right-click in the 3D View perspective --Lionel

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

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

Major refactoring of the waypoint code. The new design fits the model-view-controller pattern better.

Added MAVLinkLight as an example how to add new protocols, it is currently not an actual implemented protocol

(cherry picked from commit ed0fd7c1)

Made generator --pedantic GCC flag compatible/C89 compatible, fixed a bug where heartbeats where only sent to first link

UASWaypointManager now implements the protocol described in http://qgroundcontrol.org/waypoint_protocol

Shortened the signal names being emitted by SlugsMav.cc for the engineer view. Added translation macros tr() for the engineer view plots