agenda: fix #2355 show a notification for appointment and event creation
calebasse/static/js/calebasse.agenda.js: remove ajaxform plugin use .post instead and make only one get if a submition is successful
* calebasse/agenda/templates/agenda/index.html: add messages div
* calebasse/agenda/views.py: add messages
* calebasse/agenda/forms.py: fix new appoinment and new event form when there is no time or start_date
agenda: fix #2355 show a notification for appointment and event creation
use .post instead and make only one get if a submition is successful * calebasse/agenda/templates/agenda/index.html: add messages div * calebasse/agenda/views.py: add messages * calebasse/agenda/forms.py: fix new appoinment and new event form when
there is no time or start_date