joshsusser/refraction — pull request #16 by mindbreaker (2014-01-02 13:39:36+00:00)
Title: Update Readme.md for Rails 4

There are changes in Rails 4 and `Rack::Lock` not longer exists.

More infos: http://stackoverflow.com/questions/17131366/no-such-middleware-to-insert-before-racklock-runtimeerror-after-upgrading