Bugfixes
- Fix partition assignment race condition (jeffwidman #1240)
- Fix consumer bug when seeking / resetting to the middle of a compressed messageset (dpkp #1239)
- Fix traceback sent to stderr not logging (dbgasaway #1221)
- Stop using mutable types for default arg values (jeffwidman #1213)
- Remove a few unused imports (jameslamb #1188)
Client
- Refactor BrokerConnection to use asynchronous receive_bytes pipe (dpkp #1032)
Consumer
- Drop unused sleep kwarg to poll (dpkp #1177)
- Enable KafkaConsumer beginning_offsets() and end_offsets() with older broker versions (buptljy #1200)
- Validate consumer subscription topic strings (nikeee #1238)
Documentation
- Small fixes to SASL documentation and logging; validate security_protocol (dpkp #1231)
- Various typo and grammar fixes (jeffwidman)