Adding acknowledgements for railstutorial.org
Adding acknowledgements for railstutorial.org

RCydefe/hack-the-arch,RCydefe/hack-the-arch,mcpa-stlouis/hack-the-arch,RCydefe/hack-the-arch,mcpa-stlouis/hack-the-arch,RCydefe/hack-the-arch,mcpa-stlouis/hack-the-arch,mcpa-stlouis/hack-the-arch,mcpa-stlouis/hack-the-arch