kafka-649; patch v5; Cleanup log4j logging; patched by Guozhang Wang; reviewed by Jun Rao
kafka-1017; High number of open file handles in 0.8 producer; patched by Swapnil Ghike; reviewed by Neha Narkhede and Jun Rao
KAFKA-1029 Zookeeper leader election stuck in ephemeral node retry loop; reviewed by Neha and Guozhang
publishing test artefacts
Merge branch 'upstream-0.8' into 0.8-scala2.10