Cleanup the WAD files

[SaintWish]

It'd be nice to go through the maps and change the WAD read directory to a separate directory to clean up the mess in the main directory, and maybe go through what WADs are even used.

[frendship-loost]

Would need to recompile or (at the very least) ripent affected maps to update their texture reference paths. Consolidating or changing wads is more complicated, there's no easy way to check for dependencies aside from checking for in-game map crashes.