[CM] Ruby additions in Snd from Michael Scholz

[Bill Schottstaedt]

Michael Scholz has added several more rb files to Snd:
dlocsig.rb (from Fernando's dlocsig in CLM), ws.rb,
nb.rb, noise.rb (and .scm), index.rb, maxf.rb (and .scm),
and additions to examp.rb.  A bazillion thanks!

It was nostalgic to read those Sambox-era comments from
noise.ins -- I had forgotten them.  Took me back to the
old lab and the smell of tarweed.