various fixes (filled in holes), added a switch to trigger following DAWG definition of RDF dataset (default Graphs and no BNodes for Graph names) - default 'off'.
various fixes (filled in holes), added a switch to trigger following DAWG definition of RDF dataset (default Graphs and no BNodes for Graph names) - default 'off'.

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