Update to Rails 4 official.
Removing external services from the Procfile.

@whatupdave and I chatted about adding in things like Postgres & Redis to the Procfile. Our conclusion was that unless we can install a service from the repo, we shouldn't run it. It's enough to assume that those services are installed and running.
Some extra styling and mocking out a better homepage.
Move ActiveRecord::UUID to lib.
Remove $leaderboard constant and prototype the leader board page.