Snd 24.5:

in s7, added (settable) symbol-initial-value (the #_... value)
       changed invalid-escape-function to invalid-exit-function
       new *s7* fields: symbol-quote?, symbol-printer, and make-function
       added function-arglist
       in sublet, varlet and s7_load_with_environment, () is no longer an abbreviation for (rootlet)

checked: sbcl 2.4.5
