added back bits to maintain 2.x compatibility.
added back bits to maintain 2.x compatibility.

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