[maven-release-plugin] prepare for next development iteration
fix cardinality aggregator serde
move thanks page to main site
RemoteTaskRunner should respect worker version changes (fixes #787).
Merge pull request #788 from metamx/rtr-worker-disablement

RemoteTaskRunner should respect worker version changes (fixes #787).
update bytebuffer collections dep to fix issue with empty spatial concise sets
Merge branch 'master' of github.com:metamx/druid
prepare for next release
[maven-release-plugin] prepare release druid-0.6.159
Merge tag 'druid-0.6.159'

[maven-release-plugin]  copy for tag druid-0.6.159

Conflicts:
	cassandra-storage/pom.xml
	examples/pom.xml
	rabbitmq/pom.xml