[CM] s7: Snd in CM, CM in Snd anyway - getting patterns.scm going

[Bill Schottstaedt]

I think the bytevector? problem is that you have two versions
of s7 running -- in the current one, it's named byte-vector?
and there's an r7rs definition for bytevector? in r7rs.scm, but
r7rs.scm requires stuff first which is still using the old form -- I was
planning to make a new tarball next week.  By starting in
the current Snd directory, I think you got the new stuff.scm,
so there wasn't a collision.  

The r7rs define-record-type is based on define-class in stuff.scm --
it hasn't changed, and uses s7 environments as objects.  I can't
find an old define-record -- perhaps it was specific to cm?

require can be replaced by load if it is a problem.