Having text files be part of the system.

[Alias for KMP <TURNIP at MIT-AI>]

I would like a way to associate a text (documentation) file (or several)
with a system. That would allow me to do Tags operations over all my files 
keeping doc files up to date with the sources. Often I change the names of
functions in my system and the doc files would otherwise get out of date with
the source files. Something like

  (:DOCUMENTATION module-name doc-file-name)

would be about right, I suspect.
-kmp