MacOS X port, "home" command/button, lots of bug fixes -- into main branch!

so manually setting OPT can override what they do.

No need to mention cat_modelutil.cc; cat_model.cc #include's it.

Add PORT_OBJS to obj file list.

with any FLTK-specific modules.  Uses new tag file "libdepended".

Removed shmem.o from API

so Matt can make libparti.a.

New modules async.c and nethack.c.

Let @CFLAGS@ tell us where X include-files are.

will notice when it changes.

left it around.  Otherwise just nag.  This should only
be a problem if Makefile.in is absent, but let's say
that won't happen.
And, re-run "make depend" if Makefile changes too.

New "version" command in partibrains reports that and the partibrains.c CVS ver no.

Rather than archiving an (incorrect) copy of Makedepend,
just have "configure" create an empty Makedepend and force
"make depend" to be invoked if the user then says "make".

Add new files kira_parti (Steve McMillan's glue to starlab),
sclock (clock), notify (notification service -- not yet used),
Fl_Log_Slider (log-scaled slider).

Add default rules for .cc (and .C and .cpp) files -- not all versions of make
have them built-in.