-Allow overriding of OPTIONS_FILE in makdefs.c
-Change obsolete WIN32_GRAPHICS to the correct MSWIN_GRAPHICS
-Remove the 8514 and VESA screen control stuff since it never existed.
> There has been some feedback from others on the development team
> around the tiles:
> "The Rogue Level should ideally be text-mode. It freaks out the
> tiled-version-only players when they first get there, but that
> makes it a good reminder of NetHack's roots."
>
> The other supported tiled ports work this way too. They display
> regular ASCII characters on the Rogue level, just like Rogue did.
-Adds Rogue-level ascii support.
-Also removes unicode support.
Some other build script tweaks as well.
M. Allison
