[CM] guile and ratios

[Bill Schottstaedt]

The CVS guile has the new ratio code; see guile-devel:
http://mail.gnu.org/archive/html/guile-devel/2003-11/msg00094.html
for the announcement.  If you need help getting the CVS Guile to
build, let me know -- on my machine I always have to fix one
ifdef by hand (involving argz.h or something like that).
Also, I actually haven't tried this version of Guile yet,
so there may be incompatibilities with Snd.