new iteration facility

[GYRO at MIT-AI (Scott W. Layson)]

ARE YOU undone by DO?  Do you find mapcar pretty, but too few of the things
you want to map over are lists?  Have you seen Pete Szolovits' FOR package,
and wondered that people would want Lisp to look like Cobol?  Take a look
in  ai:apiary;gmap >  for the new wave in Lisp iteration!

This version is still experimental.  YOUR suggestions can help improve it.
Try it out!

-- Scott Layson