Add base css for cardbox app
Add base html for cardbox app

 - It extends the main project base html for app wide inclusion of cardbox_base.css
Add card model
Add custom card model form for edit and create
Remove test view from card_views
Add card delete popup template and js
Add new card div html snippet for including
Remove test urls from urls.py
Add generic delete view
Add generic create/edit view
Add generic card detail view
Add card list view and connect views
Add deck model
Enable administration of decks and cards
Make delete popup more general
Add deck specific card list view
Remove wrong h3-tags
Fix title in card_detail
Add error message if card form is emtpy
Fix link class