changed druid-0.5.7 to druid-0.6.115 and added support for overlord and middle manager
added missing java files to services/druid/..
fix license header
fixed naming conventions
modified install_openjdk so it installs java7
runs all 5 nodes
fix configurations of nodes
fix inconsistency about java installation
Merge pull request #1 from druid-io/jisoo

Jisoo