test-kitchen
- Get test-kitchen working correctly with ubuntu-12.04 and ubuntu-13.10.
CentOS
- Add CentOS support.
- Add test-kitchen test for centos-6.4.
Merge pull request #12 from pdunnavant/test-kitchen

test-kitchen

Thanks @pdunnavant!  

I'm merging this, but I'd love it if you could also do a PR for the bit of documentation you mention.