make hashing partitioner a callable class
make hashing partitioner a callable class

appsoma/pykafka,appsoma/pykafka,benauthor/pykafka,fortime/pykafka,wikimedia/operations-debs-python-pykafka,tempbottle/pykafka,sammerry/pykafka,aeroevan/pykafka,thedrow/samsa,vortec/pykafka,sammerry/pykafka,aeroevan/pykafka,wikimedia/operations-debs-python-pykafka,yungchin/pykafka,tempbottle/pykafka,yungchin/pykafka,thedrow/samsa,sontek/pykafka,benauthor/pykafka,jofusa/pykafka,vortec/pykafka,wikimedia/operations-debs-python-pykafka,fortime/pykafka,thedrow/samsa,jofusa/pykafka,sontek/pykafka,benauthor/pykafka