font-backend branch

[Kenichi Handa]

I've just committed new codes in font-backend branch.  Those
who have reported font-backend-related bugs, please test
that branch.

The change log files are not yet ready.  I committed partial
one in src/ChangeLog.fb.

As for Windows port:

I tried to compile it on Windows in cygwin environment.  By,
"make bootstrap", it seems that src/oo-spd/i386/emacs.exe is
created, but the make failed at the target finder-data of
lisp/makefile.  And, when I run src/oo-spd/i386/emacs, it
starts up without an error, but, non-ASCII characters are
not correctly displayed by garbage glyphs.  Perhaps, there's
something wrong in my changes on src/w32*.[ch].  I'm now
trying to find what is wrong, but, Jason, could you please
investigate it too?

As for Mac port:

I didn't touch any mac-specific files.  So, it can't be
compiled.  Mac-port maintainers, please adjust codes for the
new font.h and font.c by checking what I've done for the
other font-backend codes (and xterm.c and xfns.c).

---
Kenichi Handa
address@hidden