-Changed footstep volumes

-Footsteps lua code updated
-Footstep sounds can no longer cut each other off, fixing the audio pop sound

-Made the model's bounding box the size of a human model to fix a bug with equipping the model near a trigger, causing that trigger to activate.
-Lua code cleanup and improvements.

-New material based footstep system
-Lua code cleanup

-Added $rimlight for better lighting

-Improvements to C_arms

-Reduced phongexponent

-Material improvements

-Ragdoll physics improvements

-Weightpainting improvements