ordinary mixer:
- revised Ordinary Mixer I/O type
- sndo_mixer_open() take PCMs rather than strings to pass
the real relationship
- an initial version of toplevel alisp script
more alisp development:
- renamed a* functions to A* functions (acall -> Acall etc.)
- many improvements (unset*, exfun, Acall pcm_info, Asnderr, Asyserr)
- force of reusing alisp objects
- added auto-garbage-collect mechanism
- fixed bad garbage-collect (yes, the original code can free "running" lisp program)
- hctl.lisp test example
- reduced lisp object memory pool usage from 240kB to 29kB (auto-gc)
- reduced --''-- from 29kB (auto-gc) to 9kB (manual gc)
FIXME: we need definitely an opminization for the alisp object lookups
- use bsearch()?
