Gavril Gladiator 3.3

Bugfix Update V1.1
-Roof lowered by around an inch to match real car. I said I was happy with accuracy but once this was pointed out I couldn't unsee it. Thanks to @Treevus for making the edits
-Deformation of the body re-tuned to be more realistic. It's not perfect, but it's close.
-Signal lights now work thanks to @SergentFido
-Mod slot added
-A number of other small fixes