vfs: move public functions into vfs.cpp to avoid confusion (except
vfs_mount in vfs_mount.cpp, but that's obvious)
h_mgr: fix bug in filename display causing dir names to be truncated
main/gamesetup: replace 2 bools with flags; remove Atlas trampoline
functions (clutters up main.cpp)
atlas: use GameSetup.h instead of extern ..
This was SVN commit r2983.