MOVETYPE_NONE - Never moves
MOVETYPE_WALK - Player only - moving on the ground
MOVETYPE_STEP - Gravity, special edge handling -- monsters use this
MOVETYPE_FLY - No gravity, but still collides with stuff
MOVETYPE_TOSS - Gravity/Collisions
MOVETYPE_PUSH - No clip to world, push and crush
MOVETYPE_NOCLIP - No gravity, no collisions, still do velocity/avelocity
MOVETYPE_FLYMISSILE - Extra size to monsters
MOVETYPE_BOUNCE - Just like Toss, but reflect velocity when contacting surfaces
MOVETYPE_BOUNCEMISSILE - Bounce w/o gravity
MOVETYPE_FOLLOW - Track movement of aiment
MOVETYPE_PUSHSTEP - BSP model that needs physics/world collisions (uses nearest hull for world collision)