Tow Bar v1.2.0.0

Tow Bar v1.2.0.0 A tow bar gets attached to the back of a vehicle and can be used for pulling another vehicle.

Changelog: 1.2.0.0
- fixed for vehicle type "woodCrusherTrailerDrivable"

Changelog: 1.1.0.0
- added value for brakeForce
- fixed with overwritten function, the nil value for function Attachable.getCanAIImplementContinueWork
- fixed with overwritten function for Attachable.getIsImplementChainLowered
- clean incorrect game values