compression for batch-zk
code review fixes
add read to batch zk
rename to fix case issue
Merge branch 'master' into batch-zk

Conflicts:
	client/src/main/java/com/metamx/druid/QueryableNode.java
fix broken test
add unit test
fix according to comments in code review
fix spacing issue
Merge pull request #194 from metamx/batch-zk

Changed method of publishing segment ownership to ZK to use batching, includes changes to allow for migration