README - Additional Resources

[rlarsonil71]

Within the Additional Resources section at the bottom of the README, the Official Rails Documentation link http://rubyonrails.org/documentation/ is broken.

[gaand]

 ## Additional Resources
 
 -   [RailsGuides](http://guides.rubyonrails.org/getting_started.html)
--   [Official Rails Documentation](http://rubyonrails.org/documentation/)
+-   [Official Rails](http://rubyonrails.org/)
 -   [MVC](https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller)
 -   [JSON API](https://thesocietea.org/2015/02/building-a-json-api-with-rails-part-1-getting-started/)