Wrapped call of parser.start_namespace_decl in a 'try/except AttributeError' since it's not present in (at least) Jython.
Wrapped call of parser.start_namespace_decl in a 'try/except AttributeError' since it's not present in (at least) Jython.

git-svn-id: 60eb48102d1ca0c284ab3654bef916b01e1b221b@1711 4f84a9ca-5c3e-0410-8a68-0bdf370325d5

nwebs/rdflib