[CM] Snd 16.6

[bil at ccrma.Stanford.EDU]

Snd 16.6.

added snd-lint.scm (Snd extensions for lint)

s7's symbol function now takes any number of string args
   these are all concatenated to form the new symbol name
s7's make-vector no longer takes an optional fourth argument.

checked: gtk 3.21.2, sbcl 1.3.6, Fedora 24

Thanks!: Joe Python, Tito Latini.