Fixed some typos in the infected names.

Variety may be the spice of life but too much spice will ruin the pot.
It also may cause the pot to tip over if you have too much in one section.
(I had to go through the mod to organize everything to optimize performance, hopefully this helps prevent crashes. No I'm not gonna undo this update.)

Forgot to actually add the worker dudes last update. Should be fixed now.

Added l4d2 workers, changed the 'rain' dudes in the estuary to be swamp dudes, and made it so the stuff that uses the swamp dudes is more consistent with who it puts in.

Added the fireman, made it so they'll spawn anywhere the police spawn, and that they'll be more likely to show up in dead center.

Added Burger Tank employees to Hard Rain, I'll revert this update if folks don't like it.

Added in common_male_sanitation.

Added in common_male_militia among the fallen survivors

hopefully fixed some conlicts.

Added in common_female_polo_generic since I forgot to add that in last time.