bevenky

#cribbed from http://vimeo.com/52569901 (Twilio carrier call origination moderation)
# The idea is that many fan-in queues can enqueue at any rate, but
#  dequeue needs to happen in a rate-controlled manner without allowing
#  any individual input queue to starve other queues.
#  http://en.wikipedia.org/wiki/Leaky_bucket (second sense, "This version is referred to here as the leaky bucket as a queue.")
#
#  requires:
#  redis 2.6+
#  redis-py>=2.7.0
#  anyjson