rudimentary filtered aggregator
skip value lookup

compare ids instead of values
avoid typecasts
cleanup and add missing methods
add docs
we even have tests now
Merge pull request #803 from metamx/filtered-aggregator

Native filtered aggregator
add support for not filter and add test
review comments
simplify code a bit
Merge pull request #804 from metamx/notdimfilter-support

Add support for NotDimFilter with FilteredAggregator
more logging for potential NPE because of segment unmapping
update docs
[maven-release-plugin] prepare release druid-0.6.160
[maven-release-plugin] prepare for next development iteration
Merge remote-tracking branch 'upstream/master'