+ Added police siren sound to the car's "air" horn slot - use your keybind to activate it

Fixes:
- added working automatic gearbox

Improvements:
- new, realistic engines

I have updated the current two engines and added new engines:
- 1.4 TSI 92kW
- 1.4 TSI 110kW
- 2.0 TSI 162kW
- 2.0 TSI 206kW
- 1.6 TDI 88kW
- 2.0 TDI 140kW

The automatic gearbox is based on a 6-speed DSG.

Fixes:
- police lights now work

Improvements:
- engines (2.0 TDI, 1.8 TSI) fine-tuned for more realistic behaviour (does not accelerate as quickly as it did)
- transmission behaviour fixed (weird shifts)
- improved car stability (increased swaybar stiffness)
- prices in dealer changed to more realistic values

Improvements:
- realistic car weight
- improved car handling (swaybar stiffness - less bodyroll, suspension damping strength)
- improved gearbox and engines (realistic torque curves, realistic consumption)

Automatic gearbox does not work yet! It works partly if you use adaptive automatic: accelerate, when near upshift rpm (2,500 - 5,000), release accelerator and press it again, it should shift.

Fixes:
- fixed car in no dealer problem