unfucked shoulders slightly?

• remade physics for commons, hunters, smokers, witches & survivors
• fixed wrong filename on a dead body prop

• arms no longer stretch backward so much
• fixed some neck & shoulder fuckery
• why the fuck was there a script in there

tweaked spitter thigh constraints

inertia on all ragdolls changed to 3 to increase 'stability' (was 2)

stretch those shoulders

new spitter collision model

added zip bomb

added BIOS flasher