Right from the start, I've used the Xpm lib because it is very useful.
In fact, it is so useful that I'm not eliminating it from 3Dc despite
the fact that it is not a 'requirement' for development on X.  Xpm was
written by Arnaud Le Hors and GROUPE BULL.  I haven't included any
specific copyrights for them because you have to get libXpm to compile
3Dc anyway, so you'll get it that way.

In moving from Motif to plain Xaw (or preferably Xaw3d, if you have it),
I've imitated a lot of code from libsx by Dominic Giampoalo, who deserves a
lot of credit for making X accessible to beginner programmers.  Even if
you're an accomplished programmer, libsx is highly cool.  The only reason
I don't use it directly is because I had already written most of the code,
and didn't want to change too much.  All my new projects will use it though.
Also, the DrawingArea widget that he uses, written by David Nedde, is copied
directly into 3Dc - no infringement of copyright is intended, and his copyright
notice is preserved in DrawingA*.

Finally, thanks to Michael B. Martin for providing (at least temporarily)
a home ftp/http site for 3Dc.  See
http://mbmartin.bevc.blacksburg.va.us/~paulh/3Dc/3Dc.html

