Todo.

[Mark]

** fix Biped not being properly connected and disconnected from 
the map when doing physics.

-> implement damage
     -> projectile lifetime
     -> biped melee damage

-> implment sound
     -> looping sounds
     -> spatial aware sounds (3d listener)
     -> [extra] add "EAX" sound effects

-> fix biped movement
     -> not properly being connected/disconnected when doing 
physics
     -> need to implement handling multiple surface connections
     -> disable collision with certain object (weapons/bipeds)
     -> handle biped-biped collision properly

-> implement "point" collision for spherical/capsule collision

-> particle rendering or hs compiler work
     -> todo