FlightGear - Flight Simulator FGAddon

J3Cub: Add leading forward slashes to human model select animations.

J3Cub: Combined payload weight and occupant model logic.

J3Cub: YASim occupant model logic.

J3Cub: Pilot and passenger model logic, view logic, some minor refactoring.

J3Cub: Cleanup YASim version, add door-window-trim picks, occupant models and GPS to YASim ver., add Wildfire capabilities to waterdrop package.

DHC6: Update for fuel and hydraulic system. Minor sound update
- Added hydraulic pressure gauge with the hydraulic pressure being dependent on the electrical system.
- Sound of a hydraulic pump added.
- Fuel indicators also need electrical power to work. IND TEST button added, which tests the functionality of the fuel quantity indicators.
- Updated tutorials and checklists with the new features.
- Make the sound of the cabin signs more quiet and the boost pumps a bit louder.
- Pitch/volume of stall warning depend on AoA.

J3Cub: Revert persistent water weight commit, flip door hinge on barrels, water particle effect adjustment.

J3Cub: No longer used.

J3Cub: Amphibious contact point and spring adjustment to account for extra weight, persistent water weight.

dhc6: correct a typo.