Beta GL83 0.5.4

Version 0.5.2

- Added new skin Red Silver.
- Added new steel wheel.
- Added Normalmap to chassis.
- Added sport and steet version.
- Added front live axle.
- Added reflection.

- Fixed front bumper was too strong.
- Fixed body / frame detach was weak.
- Fixed Front axle break too easy.
- Fixed Rear shaft break too easy.
- Fixed engine not turned of when gearbox break off.
- Fixed rear spring stiffness was wrong name.
- Fixed exhaust detach strength.
- Fixed tire side strength... was too weak.
- Fixed deformGroup crash the game...
- etc. some small things.