Tractor Pulling Sled v1.3

Beamng Tractor Pulling Sled v1.3 (Semi Wheel Update)

(also available on Beamng Repository)

Update Includes:

- Semi Wheels by default

- Weight to 35,000 lbs max

- Ability to change sled color

- Sled type has been switched from "prop" to "trailer"

- Tow Hitch Model Update

- Chain strengthened to not break after 1 pull

- Minor other fixes