Naturalist profession

Absolutely no industrially-manufactured equipment, but highly talented
and immediately (and extensively) survivable. 6 points feels like an
appropriately hefty cost. Definitely not geared for subprime warfare,
though, with only 20 good arrows. Feels balanced to me.

Also adds a new "Wilderness" scenario that the Naturalist is limited to.
Nothing more or less than "you're in the woods". Wouldn't make
roleplaying sense for them to flee to shelters. Added compatibility for
other outdoorsman types for the heck of it.
Merge branch 'Naturalist' of https://github.com/Mdnthrvst/Cataclysm-DDA into prof
Added generic name to drug descriptions.
Prevents appearance of placeholder ammo when un-crafting.

Via the already-extant UNRECOVERABLE flag.
Replaces Naturalist's longbow with shortbow.

Anyone with the necessary strength to use a longbow will immediately be
able to make it anyway, and it'd be good not to screw over 8-strength
naturalists with a weapon they can't use.
Merge branch 'Naturalist' of https://github.com/Mdnthrvst/Cataclysm-DDA into prof
Merge branch 'drug_names' of https://github.com/desrik/Cataclysm-DDA into prof
War On Misuse of "It's"
Merge branch 'placeholder-ammo-fix' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into prof