thoughtbot/suspenders — pull request #249 by jferris (2013-12-20 20:32:56+00:00)
Title: Add spring

It's good stuff, and Rails 4.1 will include Spring by default. We may as well
get on this train early.

https://github.com/rails/rails/commit/6f72a6b53afda51a73af69194ed0060ea5048fa9