Update path to executable for FlightGear on OSX

Remove Flightgear and JSBSim and only leave options which work

Unit Tests that will run with QT_FATAL_WARNINGS=1

Remove remaining singletons

Start logging on heartbeat

View tweaks

Fix loading of meta data

Fix Joystick instantitation from settings

More works towards removing UAS completely

Fix the corner case of a system running on localhost using the networ…

Fix the corner case of a system running on localhost using the network and the loopback address in parallel. Force it onto the loopback interface.

Fix state of buttons (menu, toolbar)

Remove as many Singletons as possible

Empty APM Airframe vehicle component