Optimized update_scent for less map::move_cost calls
Additional optimization to update_scent
Add a category flag to mtypes.
Add classic zombies option.
Add classic flag to overmap specials.
Refactor MonsterGroupManager::GetMonsterFromGroup() to allways accept a reference to the mtype vector.
Suppress non-classic monsters and locations if classic zombie mode is enabled.
Disable eyebot/copbot event from triggering in classic zombie mode.
Alow wider-screen windows.
Merge branch 'master' of github.com:TheDarklingWolf/Cataclysm-DDA

Conflicts:
	crafting.cpp
Rain effect based on Tase's code.
Working rain before performance changes.
Improved rain draw performance on w_terrain window.
Dont rain all the time ...
Rain effect caused game slowdown after a while on the same tile.
Max terrain width/height 121 (Viewdistance). Center terrain if Viewport X/Y > 60.
Merge branch 'refs/heads/rain'
Modified menues to match max terrainX/Y 121
Main menu preset character up/down movement fix.
Listitems draw fix.