added 'interning'; journal how uses recno; added play_journal; added if context == self bits
added 'interning'; journal how uses recno; added play_journal; added if context == self bits

git-svn-id: 60eb48102d1ca0c284ab3654bef916b01e1b221b@618 4f84a9ca-5c3e-0410-8a68-0bdf370325d5

nwebs/rdflib