kafka-1031; Little modification to the stop script to be able to kill the proper process; patched by Vladislav Pernin; reviewed by Jun Rao
Merge branch '0.8' of http://git-wip-us.apache.org/repos/asf/kafka into 0.8
KAFKA-955 After a leader change, messages sent with ack=0 are lost; reviewed by Jay Kreps, Neha Narkhede and Jun Rao