MOVETYPE_NONE			= 0	-- never moves
MOVETYPE_ISOMETRIC		= 1	-- For players -- in TF2 commander view, etc.
MOVETYPE_WALK			= 2	-- Player only - moving on the ground
MOVETYPE_STEP			= 3	-- gravity, special edge handling -- monsters use this
MOVETYPE_FLY			= 4	-- No gravity, but still collides with stuff
MOVETYPE_FLYGRAVITY		= 5	-- flies through the air + is affected by gravity
MOVETYPE_VPHYSICS		= 6	-- uses VPHYSICS for simulation
MOVETYPE_PUSH			= 7	-- no clip to world, push and crush
MOVETYPE_NOCLIP			= 8	-- No gravity, no collisions, still do velocity/avelocity
MOVETYPE_LADDER			= 9	-- Used by players only when going onto a ladder
MOVETYPE_OBSERVER		= 10	-- Observer movement, depends on player's observer mode
MOVETYPE_CUSTOM			= 11	-- Allows the entity to describe its own physics