fix unicode issue
fix unicode issue

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