Bulk Operation

KAFKA-50 remove ZK dependency on producer

KAFKA-50 ZookeeperConsumerConnector needs to connect to new leader after leadership change

KAFKA-50 tie producer-side ack with high watermark and progress of replicas

KAFKA-50 revisit the become leader and become follower state change operations using V3 design

KAFKA-50 revisit the broker startup procedure according to V3 design

KAFKA-50 Implement clean shutdown in 0.8

KAFKA-50 using MultiFetch in the follower

KAFKA-50 controller failover

KAFKA-50 upgrade ZKClient to allow conditional updates in ZK

KAFKA-50 add an admin RPC to communicate state changes between the controller and the broker

KAFKA-50 Implement an embedded controller

KAFKA-50 implement new producer and consumer request format