Test cases for rdfms-rdf-names-use

I've just created some test cases below

  http://www.w3.org/2000/10/rdf-tests/rdfcore/rdfms-rdf-names-use/

for the issue:
  http://www.w3.org/2000/03/rdf-tracking/#rdfms-rdf-names-use

See the README.txt in that directory for an overview.

  [For some reason I don't understand it isn't appearing in the
  directory listing.]

Note that this creates a new type of test as required by the the
resolution for this issue: warn001.rdf generates the consequent
N-Triples warn001.nt along with a warning.

Dave