Replaced NoneType (which was removed in py3) with type(None) (which always worked)
Replaced NoneType (which was removed in py3) with type(None) (which always worked)

oberstet/autobahn-python,RyanHope/AutobahnPython,Jenselme/AutobahnPython,crossbario/autobahn-python,oberstet/autobahn-python,meejah/AutobahnPython,markope/AutobahnPython,oberstet/autobahn-python,schoonc/AutobahnPython,tavendo/AutobahnPython,crossbario/autobahn-python,crossbario/autobahn-python,nucular/AutobahnPython