Chipper with Stumpgrinder attachment. Eats trees whole, instantly. Please refer to readme for operations info.

Changes:
Added Stumpgrinder attachment.
Fixed issue with some map terran conflicts. (was causing chipper to rock when turning Tractor wheels while driving)
Reduced chip capacity causing tractor to wander when chipper hold was full, due to chips having a higher mass in FS19.

Working on:
Stumpgrinder visual effects
Pipe worklight visual effect
Pipe graphics overlay