Expose dns service
Add balancer
Add the rubocop file
Use new dns classes for running dns server
Tighten the dependency on rainbow gem

We can't really use anything less than version <2.0.0
because string extenion does not exist in lesser version
Assuming semantic versioning of gems, loosen the dependency
Merge pull request #55 from code-mancers/upgrade-rubydns

Upgrade rubydns