Adding toString method
Moving My Invitations close to "Invite"
Fixing a bit buttons on the login page
Adding Delete button to View Event page (only for owners of the event)
- added respective DeleteControllerServlet
- EventInvitation are cascadingly removed when an Event is removed
(need to alter manually your table, or drop it and recreate your data!)

EventDAO
- flushing after create
- removed 1 method for delete. It uses detached objects and JTA fails.
Use only with (long) eventId.