configure for chruby and disable gems for external services we won't be using.
Add github credentials for github oauth login. This is via Dave's github
account. If he wins the lottery:

Log into your github account.
Go to https://github.com/settings/applications
Register a new version of this app.
Put the new client_id and secret in config.yml as I have just done.
Stop asking Dave for money! Do you know how stressful winning the
lottery is?! He's got a lot on his mind right now. Guilt, and identity
crises, envy, isolation, hell, he probably blew half the money already.
Add first admin user to seeds