Switch win/share/*.c from hack.h to config.h plus miscellaenous
other headers. It's possible that there is conditional code that
didn't get exercised in my testing. The Unix Makefiles don't deal
with safeproc.c or tileset.c so I just compiled those without any
attempt to link.
set_tile_type frees tileset memory not in use for the current tile
type (paletted or full color).
stretch_tile and free_tile support resizing tiles at run time.
