Changes to gun stats, the damage they do to zombies, and minigun spin up

Testing fix for pain pills having a very low spawn rate.

Fixed zombies not one shotting players at lower difficulties in headshot only gamemodes.

Script to remove dual pistols for additional realism should now be working.

test

Changes to limp health speed, temp health decay was reduced again slightly. Witch received a slight health boost

Adjusted minigun damage to reflect new gun damage stats, changed temp health to go down faster. Pistols have less spread per shot and the minigun spins up faster.

Fixed friendly fire not registering correctly on difficulties below expert.

Bugfixes

Fixed a bug with pistols and the magnum drawing slowly