RDFS ready to go (incorporated reification vocab text)

I believe http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-schema-20030117/
is as ready as it'll ever be. It now includes the fixed up reification
text. I need to do the issue-closure thing with Peter, but the doc (I
believe) contains all the changes we're agreed to make (re reification,
Lists etc).

Dan