[IMP]
1/. Improved code for event, event_sale, website_event, website_event_sale and website_event_track.
2/. Improved the event form as in 'review the form: https://openerp.mybalsamiq.com/mockups/1815495.png';
3/. Improved the kanban view as 'Review the kanban: https://openerp.mybalsamiq.com/mockups/1815405.png';
4/. Accordingly improved settings and menus
5/. Event ticket: o2m editable  'Name | Ticket | Price | Quantity Available | End of Sales'
6/. Attendee list: 'Creation Date, Customer, Name, Email, Event, Ticket, Source, Satus'.