add close method to aggregators
squigglies ftw
more squigglies
properly close rowiterators
close resources as we iterate over them
fix output timestamps in groupby queries with granularity "all".
WorkerTaskMonitor: Fix isTaskRunning check
fix per tier metrics emission for new balancer
refactor balancer metric emission code
Merge pull request #109 from metamx/fix-groupby-allgran-timestamp

fix output timestamps in groupby queries with granularity "all".
Merge pull request #107 from metamx/aggregator-close

add close method to aggregators
more logging in CEQR to track down NPE
Merge branch 'master' of github.com:metamx/druid
[maven-release-plugin] prepare release druid-0.3.27
[maven-release-plugin] prepare for next development iteration
1) Remove zookeeper 3.4.3 dependency from merger
Merge branch 'master' of github.com:metamx/druid
fix NPE for master balancing; introduce max number of workers for indexing service
Merge branch 'master' of github.com:metamx/druid
[maven-release-plugin] prepare release druid-0.3.28