Hopper Leaf Springs 2.6

fixed the soft top preventing the rear door from opening
updated suspension sound

optimized some code
now uses the commons mod
made leaf exhaust tunable
changed front leaf mount to look less "flimsy"
fine-tuned some nodes to fit the suspension better
fine-tuned leaf-springs mesh to better flex with suspension

Redone the rear suspension and added the front suspension
Added softtop because it had code that messed up the suspension