[Groff] UTP - new preface and AppA

[Larry Kollar]

Thanks to Heinz for the edited Appendix A. I realized I'd left
the Preface out all this time... duhhh. I've written up the
beginnings of an addendum to the preface; if anyone wants to
comment, now is the time. :-)

-- 
Larry Kollar   k o l l a r  at  a l l t e l . n e t
"Content creators are the engine that drives value in the
information life cycle."   -- Barry Schaeffer, on XML-Doc