kafka-1192; Enable DumpLogSegments tool to deserialize messages; patched by Manikumar Reddy; reviewed by Guozhang Wang and Jun Rao
KAFKA-1544 Log cleaner takes a long time to shut down. Patch from Manikumar Reddy.
KAFKA-1483 Split Brain about Leader Partitions; reviewed by Guozhang, Jun and Neha
kafka-1549; dead brokers coming in the TopicMetadataResponse; patched by Nicu Marasoiu; reviewed by Jun Rao
kafka-1542; normal IOException in the new producer is logged as ERROR; patched by David Corley; reviewed by Jun Rao
KAFKA-1414 Speedup broker shutdown and startup after hard reset; patched by Alexey Ozeritskiy, Dmitry Bugaychenko and Anton Karamanov