make Java 8 javadoc happy
remove unused imports
clarify division operation in post aggregation
fix broken link, resolves #718
fix nested group by with hyperuniques
Merge pull request #720 from metamx/fix-nested-groupby

fix nested group by with hyperuniques
fix Union Query result merging
review comments - move merging to tool chest
Merge pull request #719 from pdeva/master

clarify division operation in post aggregation
Merge pull request #714 from metamx/cleanup-javadocs

Cleanup javadocs
review comment - have separate methods
remove unused imports
Merge pull request #721 from metamx/fix-union-query

fix Union Query result merging
update version in docs
[maven-release-plugin] prepare release druid-0.6.151
[maven-release-plugin] prepare for next development iteration
deploy api docs
fix tutorial with msg that no longer exists
Merge branch 'master' of github.com:metamx/druid
add option to generate only api or only docs