2.5.0.dev1

You can install this release via pip with pip install --pre pykafka==2.5.0.dev1.
It will not automatically install because it's a pre-release.

Minor version Features

• Added the broker_version kwarg to several components. It's currently only
  used by the librdkafka features. The kwarg is used to facilitate the use of
  librdkafka via pykafka against multiple Kafka broker versions.
• Changed offset commit requests to include useful information in the offset
  metadata field, including consumer ID and hostname
• Added the GroupHashingPartitioner

Bug Fixes

• Fixed the operation of consumer_timeout_ms, which had been broken for
  BalancedConsumer groups
• Fixed a bug causing Producer.__del__ to crash during finalization
• Made the consumer's fetch loop nonbusy when the internal queues are full to
  save CPU cycles when message volume is high
• Fixed a bug causing Producer.flush() to wait for linger_ms during calls initiated
  by _update()
• Fixed a race condition between Producer._update and OwnedBroker.flush causing
  infinite retry loops
• Changed Producer.produce to block while the internal broker list is being updated.
  This avoids possible mismatches between old and new cluster metadata used by the
  Producer.

Miscellaneous

• Upgraded the version of PyPy used in automated tests
• Upgraded the version of librdkafka used in automated tests
• Pinned the version of the testinstances library on which the tests depend