kafka-969; Need to prevent failure of rebalance when there are no brokers available when consumer comes up; patched by Sriram Subramanian; reviewed by Joel Koshy and Jun Rao
KAFKA-974 can't use public release maven repo because of failure of downloaded dependency
kafka-347; change number of partitions of a topic online; patched by Sriram Subramanian; reviewed by Neha Narkehede, Guozhang Wang, Joel Koshy and Jun Rao
kafka-879; In system test, read the new leader from zookeeper instead of broker log on completion of become-leader state transition; patched by John Fung; reviewed by Jun Rao
kafka-832; System Test - set retry.backoff.ms=300 to all test cases; patched by John Fung; reviewed by Jun Rao
kafka-883; System Test - update migration tool testsuite after 0.7 ProducerPerformance sends seq MessageID; patched by John Fung; reviewed by Jun Rao
KAFKA-987 Avoid checkpointing offsets in Kafka consumer that have not changed since the last commit; reviewed by Neha Narkhede
Merge remote-tracking branch 'upstream/0.8' into my-0.8
sbt.boot.properties deleted again