Add OAuth, OmniAuth, and OmniAuth-Goodreads.
Add Link and Route for goodreads login.
Add Login with Goodreads OAuth functionality.
Change User migration to include provider, uid.
Add User model methods create_with_omniauth, random_username, random_password.
Merge pull request #92 from tiger-swallowtails-2014/gr_oauth

Goodreads OAuth functionality
begin building user profile modal
made JS work with sample data
pull WPM data from controller to render chart
charts working woo hoooo
fixed book carousel and chart rendering on profile