[CM] Snd 16.8

[bil at ccrma.Stanford.EDU]

Snd 16.8.

cmn: Michael Edwards got cmn to work in ECL.

s7: object->let
     changed ->byte-vector to string->byte-vector
     let-temporarily is now built-in

checked: sbcl 1.3.8|9, gtk 3.21.5

Thanks!: Michael Edwards.