-Improved ragdoll physics

-experimental ragdoll physics fix

Shared update across all of my playermodels:
-Footsteps will no longer keep playing when the player is dead

-material improvements

-slowed down smimming animation

-small animation improvements

-changed jump sound volume

-increased jump sound volume

-testing client and server side viewheight code fixes
-implemented a timer which limits the jump sounds when you spam jump key
-jump sounds now have random pitch

-added a death animation (this will only play if an addon adds this feature)