[CM] CM 2.9.1 + RTS 2.0 released

[Rick Taube]

> away zillions of realtime processes :-) (havent tried with
> midishare or osc yet, just portmidi).  This is sbcl-0.9.9*, and

you should be able to output to any of them (they are all under 
construction...) but only portmidi receving is probably working. in a 
nutshell the new receiving api is:

(recv <stream> )  ; starts C thread receiving on stream
(recv-stop <stream>) ; stops it
(recv-set! <stream> <hook>) ; set/clear receive hook
(recv? <stream>) ; predicate