Merge pull request #117 from darxriggs/a6dc29cf85fe617a96b70ca3cf84150b9e2e86f4

cleanup - removed extra empty lines
update emitter version and fix some NPEs
Merge branch 'master' of github.com:metamx/druid

Conflicts:
	client/src/main/java/com/metamx/druid/QueryableNode.java
	server/src/main/java/com/metamx/druid/http/ComputeNode.java
[maven-release-plugin] prepare release druid-0.3.34
[maven-release-plugin] prepare for next development iteration
Merge pull request #118 from darxriggs/master

cleanup & refactoring
1) Adjust the GroupByQuery to also be able to merge results on the local node.  Fixes #116
2) Make the GroupByQuery operate in a multi-threaded fashion by default (this is configurable via druid.query.groupBy.singleThreaded).  Fixes #96
3) Fix up some post aggregation computation stuff.  I believe #72 is fixed
4) Fix case sensitivity issue with post aggregations on GroupBy queries