FlightGear - Flight Simulator FGAddon

CH650: Maintenance
* Removed dubious textures, start replacing with freshly created instruments
* Add ALS procedural lights and Compositor lights
* Formatting, Structuring
* Improved electrical system
* Moved code from nasal to property rules where possible
* Remove duplicate XML markup

Fix the FDM, add a missing directory and add two more previews images

Treat the Fokker 50 the same as the ercoupe and Fokker-100 series: Improved lghting, improved releftion effect.

AlphaElectro: Maintenance
* Replace ar-6201 and bxp6401 by FGData variants
* slightly restructure ALS procedural lights
* Replace light manager by Compositor lights
* Add cockpit light

Add a preview for the Fokker 70 and one for the Fokker 130

Treat the F130 the same way as the F100 and F70

ASK13: remove legacy ALS shadow volume (superseded by Compositor shadows

ASG29: Maintenance
* remove legacy ALS shadow (superseded by Compositor shadows)
* use library (Aircraft/Instruments-3d) instruments where possible (vario, flarm, comm radio)
* Add positon elements to many sounds
* Remove unnecessary files

DA40 (NG): Remove duplicate/old files

DA40 (NG): Cleanup, compositor updates:
* Add interior reflection and shadow cubemaps, shadow and instrument reflection effects
* Remove legacy ALS volume shadow (superseded by Compositor shadows)
* Remove unused instruments (kt76a, amps, cht, egt, fuel, fuel-prime, fuel-temp, hdg, hi, oil-press, oil-temp, rpm
* Add Davtron M803 digital clock simulaton
* Add Sigmatek directional gyro simulation
* Remove legacy ALS light manager, add new Compositor lights
* Remove IFR conventional panel startup -set.xml, superseded by Panel Configuration dialog (allows to toggle between conventional IFR and VFR panel)
* Add documentation regarding references and instruments simulated
* General cleanup, style updates