More Dynamic Mud FINAL for Spintires file

More Dynamic Mud
-Dirt/Mud surfaces now consist of different materials depending on depth.
The top layer is dry soil with damp soil underneath, thick mud below that, and loose sloshy mud even lower still. Finally super deep down is a mix of mud and clay.
-There are a total of 27 Particle types used over 7 variable situation dependant effects!
Spinning the wheels, sliding sideways, pushing mud and driving fast all create their own effect variations which combine with depth based particle choice to create LOTS of variation!

This is the final version of More Dynamic Mud, I can't really see any way of improving it further without rewriting the particle generation from scratch!