- removed gamemode variable. All it was used for were some checks that
really should depend on GI_MAPxx.
- Externalized all internal gameinfo definitions.
- added include to MAPINFO parser.
- split IWAD detection code off from d_main.cpp into its own file.
- disabled gamemission based switch filtering because it is not useful.
- added GAMEINFO submission by Blzut3 with significant modifications. There
is no GAMEINFO lump. Instead all information is placed in MAPINFO, except
the data that is needed to decide which WADs to autoload.
SVN r1497 (trunk)
