Add initial work on 'database' machine.

Development deployment is working; production deployment is untested so
far.
openid_provider: Use MariaDB instead of the default SQLite database
Update README
openid_provider: Add 'Register' link for users who aren't logged in

Previously you had to click 'Log in' in order to be able to register,
which seems a bit counterintuitive.
database: Fix deployment to production

Also, add Storyboard user.
openid_provider: Fix deployment to production
frontend: Add some info to README
storyboard: Work in progress on production deployment