Experimental change.
Before updating, delete folder tf\custom\horde_project\scripts\vscripts\zombiehorde\
Zombies:
* Improved melee hitreg.
* Medic now passively emits Amputator Aura.
** Probably doesn't stack with the real Amputator.
* Gas Passer now ignites enemies.
* Soldier starts with a full Banner.
Survivors:
* Last 3 Survivors get mini-crits. Last Survivor gets full crits.
* Medic's Uber Rate increased x1 -> x2.
* Natasha's change to slow was reduced 100 -> 15
