-Small changes to footsteps

-Improved the surface-based footstep system so the model does a tracehull calculation to determine what type of surface you are standing on, like normal player-footsteps, instead of using one traceline.
if you notice any performance issues with this, use "player_dinosaur_footsteps_cheap 1" to use the old method.
-New water footstep sounds

-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