Generate devise views.
Add Rails Bootstrap Forms Gem.

https://github.com/bootstrap-ruby/rails-bootstrap-forms
Stop gradient from repeating.
Change new user form to use bootstrap styling.
Add bootstrap formating to login page.
Add extra form parameters to the application controller for devise.
Add root_url link to navbar site title.
Add feature to add card to deck
Add `New Deck` button to the decks view with a modal.