don't use .message, which is removed in Py3; better logging (fixes #479)
don't use .message, which is removed in Py3; better logging (fixes #479)

jvdm/AutobahnPython,ttimon7/AutobahnPython,Geoion/AutobahnPython,schoonc/AutobahnPython,crossbario/autobahn-python,RyanHope/AutobahnPython,oberstet/autobahn-python,Jenselme/AutobahnPython,oberstet/autobahn-python,hzruandd/AutobahnPython,meejah/AutobahnPython,markope/AutobahnPython,oberstet/autobahn-python,inirudebwoy/AutobahnPython,tavendo/AutobahnPython,nucular/AutobahnPython,crossbario/autobahn-python,crossbario/autobahn-python