Consumers

* Initial support for consumer coordinator [offsets only] (toddpalino PR 420)

* Allow blocking until some messages are received in SimpleConsumer (saaros PR 457)

* Support subclass config changes in KafkaConsumer (zackdever PR 446)

* Support retry semantics in MultiProcessConsumer (barricadeio PR 456)

* Support partition_info in MultiProcessConsumer (scrapinghub PR 418)

* Enable seek() to an absolute offset in SimpleConsumer (haosdent PR 412)

Producers

* Cath client.reinit() exceptions in async producer (dpkp)

* Producer.stop() now blocks until async thread completes (dpkp PR 485)

* Catch errors during load_metadata_for_topics in async producer (bschopman PR 467)

* Add compression-level support for codecs that support it (trbs PR 454)

* Fix translation of Java murmur2 code, fix byte encoding for Python 3 (chrischamberlin PR 439)

* Only call stop() on not-stopped producer objects (docker-hub PR 435)

* Allow null payload for deletion feature (scrapinghub PR 409)

Clients

* Use non-blocking io for broker aware requests (ecanzonieri PR 473)

* Use debug logging level for metadata request (ecanzonieri PR 415)

* Catch KafkaUnavailableError in _send_broker_aware_request (mutability PR 436)

* Lower logging level on replica not available and commit (ecanzonieri PR 415)

Documentation

* Update docs and links wrt maintainer change (mumrah -> dpkp)

Internals

* Add py35 to tox testing

* Update travis config to use container infrastructure

* Add 0.8.2.2 and 0.9.0.0 resources for integration tests; update default official releases

* new pylint disables for pylint 1.5.1 (zackdever PR 481)

* Fix python3 / python2 comments re queue/Queue (dpkp)

* Add Murmur2Partitioner to kafka __all__ imports (dpkp Issue 471)

* Include LICENSE in PyPI sdist (koobs PR 441)