Added compat profile for TNT MAP31
Fix alt-tabbed desync with demos

- Fixed: Stop the game timer if the window looses focus
Added text showing who paused a game in multiplayer
link output_sdl.so against SDL
-Added: CAUSEPAIN. Actors which deal damage (even if 0) while having this flag can cause other actors to trigger pain chances.
-Fixed: ALLOWPAIN should not trigger pain states if the damage is 0, but still allow for infighting to occur.
-Fixed: an unneeded logic call was processing damage modification when it was 0 to begin with.
- Added CPF_NOTURN flag for A_CustomPunch.
Merge branch 'cpf_noturn' of https://github.com/edward-san/zdoom
Fixed missing NULL pointer checks
Missed a save
Yet another pointer
Fix slope inconsistency for 64bit

- Fixed: Slope logic would change between 32bit and 64bit due to float
math.
Merge branch 'master' of https://github.com/rheit/zdoom

Conflicts:
	wadsrc/static/compatibility.txt
- now that we don't have to care anymore about SVN-related merging problems, let's save the 3 global variables of the GL renderer unconditionally, even if the software renderer is running.