Adds compressed air horn.
Cowboy hat.

As requested by Mdnthrvst on IRC.
Spawn locations

Marginally more common than the top and bowler hats, but not Fancy.
Upgraded the hat

Still not "fancy", but better material and warmer.  (Thus, heavier.)
MYO Cowboy Hat

Recipe.
Starter weapons
Adds craftable ferromagnetic rail rifle.
10-Gallon Hat

This is the Bigger and Fancier version.  Modeled it as Wool since Fur
Felt isn't in-game.  Lemme know if you've got any better ideas.
Go-bag

Item and recipe.  (You'll want to disassemble it.  Packing, not so much,
but I suppose you could keep it in your vehicle or something.)
Should be "good"

...inasmuch as the LARGEST RECIPE IN CATA could be good.  This be a
Hack.  But hopefully it's a good starting point.
Adds missing item spawns for pet foods and dog whistle.
Merge airhorn.

Conflicts:
	data/json/item_groups.json
	data/json/items/tools.json
Merge cowboy hats.

Conflicts:
	data/json/item_groups.json
Merge early game salvageable gear.

Conflicts:
	data/json/recipes.json
Merge rebar railgun.

Conflicts:
	data/json/items/ammo.json
	itypedef.cpp
Merge gobag.
Merge missing item spawns.