FlightGear - Flight Simulator FGAddon

mosquito: Make rudder control differential braking, similar to real aircraft.

At rudder=0, left and right brakes are maximum.

If rudder is to left, left brake is always maximum and right brake decays to
zero at full rudder. So one brake is always at maximum, and total braking is
maximum at rudder=0.

[Might be better to maintain total braking force as a constant; this would make
the brakes more differential.]

A320-family: Merge trunk into release/2020.3

Add support for metalic reflective liveries

Harrier-GR3: correct the rotation direction of the HSI.

A320 update:
- Addition of Canvas QNH
- Addition of pushbutton sounds
- Addition of FPV indicator on PFD
- Addition of weather radar (pulls from online API)
- Electrical bugfixes
- Improved ECAM warnings

767-300: Removed cabin announcements

747-8i: Removed unneeded binding in MCP; fixed a compatibility issue in recent versions MP; improved the Boeing -8F livery

Various changes by e_pilot:
* switched to a git repository. Detailed changelogs can now be seen at https://sourceforge.net/p/flightgear-cessna-208b/code/commit_browser

CH650: remove problematic files, redo Dynon D180 texture, replace Dynon D180 screen with canvas version, replace KT76 by GTX327

CH750STOL: remove problematic avionics textures; redo Dynon D180 texture