Start switching to standard Collection+JSON
Fix tags and categories
Make PUT and POST conform to Collection+JSON
Put start_time and end_time back on the event
Make location conform to Collection+JSON
Remove dead code
Don't handle input as collection objects
Remove one level of dict in input cstruct
Make DELETE response return a 204
Make POST compatible with Collection+JSON
Remove unused Data model
Format single item as Collection+JSON
Ajout des attributs href pour Collection+JSON