[CM] snd 6.11

[Bill Schottstaedt]

Snd 6.11:

added ladspa.scm and ladspa-help.scm thanks to Kjetil S. Matheussen
  and Dave Phillips.

add nth arg to find-sound (for save-state when the same
   file is open more than once).
added optional begin time to make-track-sample-reader,
   play-track, and play-mix.
removed button-font and help-text-font, and associated resources
removed protect-region and associated GUI support
several Sun-related bugfixes thanks to Russell Aspinwall
ladspa struct constants and accessors
In Motif 2, I'm using renditions rather than fontlists.
added dac-is-running and start-playing-selection-hook.

CLM: removed old-style.*
     removed LONG_INT_P support (it had been completely broken for years)
     removed just-lisp option (only worked on big-endian machines, not 
useful).
     double-float -> double in clisp/cmu (forced by package stupidity)
     Half-ported to linuxppc/openmcl -- CLM builds, but instruments don't
       want to load yet.

CMN: audible-mixin copy method bugfix (and others) thanks to Anders Vinjar.
     ratios for Guile.

checked: Forte C 6.2 (Sun), Mandrake 9.1 LinuxPPC, Ruby 1.8.0,
     fftw 3.0.1, gtkglext 1.0.2

with much help from: Juan Pampin, Michael Scholz, Russell Aspinwall,
   Frantisek Stafek, Jurgen Keil, Paul Kirk, Bret Battey, Anders Vinjar,
   Dave Phillips, Kjetil S. Matheussen.