[MP] Remove unused renderer functions.
[MP] Make AVI still split at 2GB limit.  CVar cl_avi2GBLimit to turn this behavior off.
[MP] Leftover Dedicated tr_landscape.h removed.
[MP] Add clipboard support to SDL2 backend. Fix control keys not working. Remove unused profiling functions
[MP] Move processor affinity code to platform-specific files. Check return value of getcwd on Unix systems
[MP] Fix bad merge for processor affinity code on Windows
[MP] Fix compilation issues with min/max in snd_music.cpp
[MP] Fix dedicated server linker error with setting processor affinity
[MP] Fix typo >_>
[MP] Fix last silly error in affinity code. Honest
[SP] Minor cgame fixes.
[SP] MD3 big endian fixes
[SP] Ghoul 2 big endian fixes
Merge pull request #534 from BSzili/master

Big endian fixes for the model loaders.
[MP] Fix 2D Screen Tint effects for certain powers/in lava/in slime/in water being too opaque.
[MP] Remove some cgame RMG code.
[SP] ROFF big endian fixes
[SP] ICARUS big endian fixes
[SP] Fixed R_LoadLightGridArray on big endian platforms
[MP] Remove unused functions from renderer.