1) Update version of http-client
Limited retries on s3 segment puller exceptions

Useful for reducing spurious alerts due to general s3 flakiness.
Move retryS3Operation to S3Utils
Remove unused methods from S3Utils
Retry s3 operations on non-wrapped IOExceptions

Can happen if we get a socket related mishap while fetching an s3 object.
fix master speed issue with immutable copy of in druid server, better exception handling in moving and dropping segments
[maven-release-plugin] prepare release druid-0.5.6
Merge branch 'master' of github.com:metamx/druid
fix version problem
[maven-release-plugin] prepare release druid-0.5.7
[maven-release-plugin] prepare for next development iteration
better logic for exiting load rule assign if replicants cannot be created
[maven-release-plugin] prepare release druid-0.5.8
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release druid-0.5.9
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release druid-0.5.10
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release druid-0.5.11
[maven-release-plugin] prepare for next development iteration