fixed weapon equip stations not stripping player weapons

possible fix for platform on obstacle being stuck

fixed shadows on trap minigame
fixed doors on deathrun not killing zombies
platform on obstacle starts moving as soon as a player steps on it
zombies can't enter the weapon equip stations anymore
possible fix for being stuck in game select phase

humans can equip themselves with more than one weapon from the weapon stations per round
added particles and sound to the barrels at the trap minigame
fixed zombies being able to spawn early into obstacle when they respawn

replaced the weapon equip system
fixed some lighting artifacts
replaced background images
fixed some gaps in world geometry
increased dynamic shadow range
added teleport below castle defence ladders
fixed infected players not receiving low gravity

Created ze_games_p.