* improvements for find-all and unify
files and CHANGES notes: http://www.newlisp.org/downloads/development
What are the changes to unify? The changelog wasn't very clear.
In 'unify' symbols like +,-,*,/,? etc. were taken as variables like A, B, C. Now variables are strictly symbol names starting with upper-case A to Z as the manual always has said. The function 'expand' (in the 3rd syntax) already behaved that way.