Adds kitchen tests to the cookbook.

This is branched off the `service-init` branch.
Updates README.md with information to run tests

This includes unit tests as well as integration tests.
Merge pull request #25 from cotap/kitchen-ci

Kitchen ci
Merge branch 'master' into support-centos-6
Add centos-6.5 to test configuration
In serverspec, force Debian instead of DetectOS to properly detect statsd service for upstart on CentOS 6.