fixed sleepycat namespaces not being URIRef. fixes #201.
fixed sleepycat namespaces not being URIRef. fixes #201.

yingerj/rdflib,ssssam/rdflib,marma/rdflib,avorio/rdflib,yingerj/rdflib,ssssam/rdflib,armandobs14/rdflib,armandobs14/rdflib,yingerj/rdflib,dbs/rdflib,avorio/rdflib,RDFLib/rdflib,dbs/rdflib,dbs/rdflib,dbs/rdflib,RDFLib/rdflib,ssssam/rdflib,armandobs14/rdflib,RDFLib/rdflib,ssssam/rdflib,avorio/rdflib,armandobs14/rdflib,avorio/rdflib,yingerj/rdflib,marma/rdflib,RDFLib/rdflib,marma/rdflib,marma/rdflib