COMMON: Fix missing arjDecoder class variable init. CID 1002929

This fixes a couple of these variables by removing them as they
are unused or set-but-unused variables.
FULLPIPE: Implement MovGraphReact::pointInRegion()
FULLPIPE: Give more meaningful name to method parameter
NEVERHOOD: Split sprites from their scenes in modules 2100 and 2200

This also reduces inter-header dependencies
NEVERHOOD: Split sprites from their scenes in modules 1700 and 1800

This also reduces inter-header dependencies
NEVERHOOD: Split sprites from their scenes in module 1600
TSAGE: R2R bugfix for objects being removed and then readded incorrectly
TSAGE: Renaming for R2R Drive Room
TSAGE: Implemented semi-transparent door in R2R suit room
TSAGE: Renaming for R2R Lander Bay 2 Storage
TSAGE: Bugfix for rotating suits in R2R storage room
WINTERMUTE: Let pixel blending functions be inlined
NEVERHOOD: Split sprites from their scenes in modules 1300 and 1400
NEVERHOOD: Split sprites from their scenes in module 1200
FULLPIPE: Silence false positives about uninitialized variables in MSVC
NEVERHOOD: Split sprites from their scenes in modules 1000 and 1100
NEVERHOOD: Clean up some includes
NEVERHOOD: Move specialized Klaymen code for modules 1000 and 1100
TSAGE: Graphic fixes for R2R dissolving drive room stasis field
NEVERHOOD: Move module-specific Klaymen code to its respective module