Alternative implementation of WheelUpdater using collision checker coroutine.
No continious logging of the same message from the ScreenMessager anymore.
Use per-wheel LastID. Added debug logging, as the whole framework does not work: no parts are associated with hitted colliders.
Use Part.GetModule instead of Modules.OfType.
Reverted from using GetGroundHit to OnCollisionEnter, as the former does not provide quick way to get the collided Part.

Added green highlighting of stiffened wheels for debugging.
Removed WheelUpdater injection framework. Using MM instead. Works better. Fixes #90.

Also removed debugging code.