FlightGear - Flight Simulator FGAddon

Ka6: minor fixes

Siwtch to the simple reflection effect, which is more than enough and remove some nans from the .ac whil whcih caused: osgDB ac3d reader: could not parse texture coords while reading object

Use the new wingflex shader model

Pterosaur: change to new fgdata wingflex effect/shader

Ka6: add interior shadows, switch to FGAddon shader implementation

J3Cub: Missed carb heat mesh conflict, add castor to amphibious front gear (prior commit)

J3Cub: Slip ball rotation point, carb heat mesh conflict, fix manual start, mesh z-fighting fix, livery fix

Moved old A320-family to attic as replacing with new A320-family from https://github.com/legoboyvdlp/A320-family.git

J3Cub: Add low res texture liveries, miner sound change, new mooring position

Ka6: major update