Revision of #605: requested alterations.

origin: http://www.garagegames.com/community/resource/view/6538/1

Verification methodology/usage:
Functions for stock player physics.
1) Add a convex shape named Hitbox0, Hitbox1 ect (up to 20) to a player model. Can be children of bones so that they animate. (If not, falls back to stock bounding box + percentile lookups.)
2) Go to game scripts\server\projectile.cs
in the method ProjectileData::onCollision(%data, %proj, %col, %fade, %pos, %normal, %hitbox), flip on the remmed out comment. %hitbox should reflect a given hitbox mesh struck.