Presented at RailsConf, April 2015
Links included in this presentation:
* https://claudiob.github.io
* http://api.rubyonrails.org/v4.2.0
* https://github.com/rails/rails/pull/17227
* https://github.com/rails/rails/pull/19029
* https://github.com/rails/rails/pull/19060
* https://github.com/rails/rails/pull/18325