try to make javadoc happy
some tests for broken approx histo
http accessible while loading + status endpoint
docs for router node
correct mistakes
Merge pull request #777 from metamx/initialized-endpoint

Historical endpoints accessible while loading + new loadstatus endpoint
fix ApproximateHistogram combining factory
Merge pull request #779 from metamx/fix-histo

Fix groupBy with histograms
doc fixes
update druid-api for json parsing improvements
Merge pull request #780 from metamx/new-druid-api

update druid-api for json parsing improvements
add headers for druid vs pages
fix compile
jax-rs smile support
prepare for next release
[maven-release-plugin] prepare release druid-0.6.157
[maven-release-plugin] prepare for next development iteration
remove unused jsonspec content type
add example hadoop config
slight clarification about hadoop setup