Change log:
8b69169 Upgrade versions; prepare for release
5a352d2 Javadoc Polishing
b7663d3 Adjust repositories in build.gradle
2b2bb89 Don't cache tx producers after reset()
e9c5203 GH-1637: Fix TopicPartitionOffset.hashCode()
65cec04 GH-1631: fix missing @sendto for cglib proxies
79a9e9a GH-1519: Fix @sendto on @KafkaHandler
ef1b322 GH-1621: Fix test for back-port
d368518 GH-1621: Fix nack() with Tx Batch Listener
24225a2 API Compatibility Back Ports
c0ce468 GH-1613: Fix Race in Producer Factory