add categories to item types
Adds 55 gallon steel drum.

The final statement in fluid storage.
Recipe.
Tweak.
Boosts stats on the ferromagnetic rail rifle.

So it does in practice, what it did in theory.
Tweak.
30 gallon barrel.
Halligan tool.
Category select mode added to inv and drop menu

Both the inventory and the multidrop window now support both item and
category select modes. [SPACE] is used to toggle between modes. Item
select mode is the regular (and default) mode that everyone is already
used to. Category select mode jumps between the first items in different
categories.
Firefighter's pickhead axe.
Recipes for the forge.
Fireman's helmet!
Tweak.
30 gallon drum recipe.
Tweak.
Fire fighter clothing stuff!

Bunker gear for all parts of the body, with bonus separate nomex inner
layers!
Better nomex integration.
Category select mode added to adv. inv. menu

Added the category select mode to the advanced inventory window.
Fix recipe iv_mutagen_troglobite
Huge content expansion.

New profession, two new oxygen tank tools, new monster type and item
groups, new support for cop_gear item group group, better cop_weapons
item group, new skill/recipe book, new survivor suit variant, tuned up
firetruck item spawns, and fixed a couple of errors here and there too.