Migration of all python code, mostly withtout chagnes. And adapting
xml files to guidelines.
On calendar.py, some changes have been perform to make the migration works :
- `_compute` method has been split into `_compute_dates`, `_compute_attendee` and `_compute_display_time`.
- remove unused method `onchange_partner_ids`, `check_partners_email`
- make `compute_rule_string` use a cache record instead of a value
dict to avoid crashes
- remove `new_invitation_token` method, and make it a default value on attendee creation
- add a default value on `day` field, otherwise the "Please select a
proper day of the month" exception is raised during the onchange
Basicaly, do this RPC once, at webclient startup, to get the next notification.
Do the RPC again when the notification is displayed to get the next one.
When an event with alarm is created, edited or removed, trigger an event on the
bus for all involved users (the attendees) with an update of their next
calendar notification.
xmo-odoo