Rails 3 spike

:bomb: DO NOT PULL :bomb: 

This is a Rails 3 spike which takes the Humpty Dumpty approach :hatching_chick: upgrade, break everything, and see if you can put it back together :anguished: 

I'm just opening this PR to give everyone visibility (check out my dirty laundry :poop: )

So far I can boot the development server, the next step is to get the tests running (not passing) and then evaluate if it's worth continuing this spike.