created utility "cvsgrep" from "rcsgrep" shipping with O'Reilly's "Unix Power Tools" (the code TAR ball)

Derived cvsrevs from rcsrevs, and cvsgrep from rcsgrep. This is really nice!! Imagine this:

$ cvsgrep -a SEARCHME files…

I knew,  rcsgrep and sisters would be very, very useful.

svngrep should be quite useful as well.