switched to PostgreSQL, scrapped cheapskate

(getting more production-like)
implemented login stuff app-side
added rails_12factor gem for production
don't include development.rake in production
only include query_diet widget in dev
made web font import protocol-agnostic
moved logo.png to public/
welcome back, cheapskate :)
added the appropriate cheapskate configuration
force SSL for login and register routes in prod
reformatted the force_ssl chunk 'cause it was TOO LONG
cheapskate grew up a little bit
fixed the 'Add another option' link