* mpw-configure (prefix, mpw_prefix): Handle it.
(ARCHDEFS): Add to makefile editing.
(TDEPFILES, TM_FILE, XDEPFILES, XM_FILE, NAT_FILE): Add to
makefile if defined.
(mpw-edit-prefix): Use during makefile editing.
* mpw-config.in (mmalloc, readline): Don't configure.
* mpw-build.in (thisscript): Rename to ThisScript.
Use mpw-build instead of BuildProgram everywhere.
(mmalloc, readline): Don't build.
* mpw-README: New file, basic documentation about the MPW port.
