A slight fix for SDL2 for windows compiling.

You shouldn't have to put SDL2 in the root include directory. If your
machine is setup like that, then your machine is setup wrong.
fix sign warnings in mutation.cpp
fix sing warnings in live_view.cpp
fix sign warning in overmapbuffer.cpp and player_activites.cpp
fix sign warning in input.cpp and inventory_ui.cpp
fix some sign warnings in game.cpp and astyle
Re-secures Lab and Bunker doors

Hadn't realized that the metal doors were only used with card readers.
This removes my expanding them.  :-/
Changes to vending machine prices
Balance bulter profession

Dropped the point req by one, added a few points in driving/tailoring.
Should bring it in line with most other professions.
Raised water's cost
Adds (drink) note

By Wuzzy's & Rivet's request, at #6494.
Wev
Fixes cowbell morale boost

Was intended to give a max of 15 + 15 more for every MUTCAT_CATTLE
mutation of the player, up to 150, but due to an error each mut gave 8
times more max morale than it was meant to.
Fix %% typo when reading books
Strip trailing spaces from map screen per issue #6478
Stripped spaces per issue #6478. For real this time.
Merge pull request #6496 from KA101/cocktail-clarification

(Ready) Clarifies screwdriver
Fixe shotgun trap not returning ammo
Merge branch '6463-fix' of https://github.com/werty1124/Cataclysm-DDA into werty1124-6463-fix
Merge pull request #6490 from IOSYN/Professions

Balance bulter profession