Gravil Semi Wheels 2.1.1

- Updated to BeamNG 0.3.*
- Steel and Aluminium Truck Wheels;
- Steel and Aluminium 8 to 10 hub adapters matching with wheel materials;
- Heavy Duty Low Profile Tires (same proportion as tires used in trailers, e.g. Conti EcoPlus HD3) and common Sport Tires;
- XXL Dually Fender Flares to fit larger wheels;
- Removed previous semitruck turbo diesel swap;

Now the wheels are in the same Heavy Duty 8-Lug category