Heavy refactoring, ported wittlist to handlebars

Added djangorestframework API
Wittl cards are now loaded with JS instead of django
Changed comparators to run by ID instead of name

Minor refactoring, moved comparator data to item class
added list_items to the api
Added hide sidebar on outside click

Removed dead JS code
Removed dummy JSON
Moved score-data and listitem data to API
Refactoring of WittlSorting to allow data reload

Moved item inserting to the API
Added dynamic wittl insertion
Merge branch 'handlebars_wittlist'