No RJS

:fork_and_knife: This removes the usage of RJS from the cookbooks update, follow and unfollow actions. RJS while useful can lead to [security issues if implemented incorrectly](http://homakov.blogspot.com/2013/11/rjs-leaking-vulnerability-in-multiple.html) and can become brittle and add unnecessary complexity to a simple problem. I'd like to address the problem at hand (making the application feel more reactive) at more of an application level using something like Turbolinks or PJAX. For now though I think having these actions as full page reloads is fine and removes a bit of complexity and risk.