Created Cloakable behavior.
Added support for Cloakable behavior.
Added velocity retainment coefficient to BouncesOffSurfaces.
Bugfix: Multithread comodification risk in pop() and free().
Added skip-NAV system property feature in Mission.
Bugfix: Tunnel identification billboards show even with hidden tunnels.
Added Cloakable ability to Player.
Bugfix: Debris fails to bounce off tunnel sides.
Added Cloakable support to PowerupObject.
Bugfix: WorldObject stays momentarily visible when destroyed.
Added aimRandomness capability to AutoFiring.
Monad support in HorizAimAtPlayer.
Bugfix: incomplete monad SteadilyRotating.
Created Smoke and SmokeFactory.
Created SpawnsRandomSmoke behavior.
Bugfix: Invisible tunnel entrances show up in NAV Radar.
Added support for Smoke and SmokeFactory.
DEFObject: Slowed planes down, early boss firing behavior w/ randomness
in aiming.
Bugfix: Explosion displaced by WorldObject being sent to the Land Of
Wind And Ghosts due to improperly shared position vector.