Durk Talsma

Remove all bindings from the Joystick definition, except the HAT switch. All bindings are now in the Event/ descriptor.

New bindings for the Honeycomb Aeronautical Alpha Flight Controls.

New bindings for the Honeycomb Aeronautical Bravo Throttle Quadrant

Merge branch 'next' of ssh://git.code.sf.net/p/flightgear/flightgear into next

Some prepratory work for FGTraffic 2020: Added utils/traffic, a sample C++ source/header file, and the necessary changes in the CMakefile system to allow automatic compilation.

AI traffic refused to take-off, because the TrafficRecord destructor would unassign an AIAircraft from it's ATC. This caused it to get stuck in front of the runway and block all other traffic.

Temporary fix: ground networks are not loaded when a navcache is present. But, the AI/ATC code relies on radio frequencies listed in the groundnet files. Since these are not imported into the nav cache, they remain 0.

A second init() is necessary to start the ATCController. There's probably a better way to do is, but for now let's just stick to how I had it set up in early 2012.