add readme note about cli tools
add readme note about cli tools

benauthor/pykafka,wikimedia/operations-debs-python-pykafka,thedrow/samsa,yungchin/pykafka,benauthor/pykafka,yungchin/pykafka,wikimedia/operations-debs-python-pykafka,wikimedia/operations-debs-python-pykafka,benauthor/pykafka,thedrow/samsa,thedrow/samsa