Purpose of this commit is to clean and ease the use of tracks in
event management.
* status is change to stages. Those are global for all event as we
consider track acceptation process as similar across events;
* change speakers many2many to a one2many. Most event have only one
speaker or at least a main speaker;
* add various chatter features: tracking of template, subtypes,
suggested recipients, ... Also add activities on tracks and their
various filters;
* add automatic mailing on stages like already done in tasks or
issues;
* tweak display of tracks on agenda. Event manager see unpublished
tracks with the right label in order to know the status of the various
event tracks.
Also switched rule to noupdate. A manual fix of existing installations
will be necessary, as is usually the case for ir.rules changes.
This module has not made it into a LTS version yet, so it is acceptable.
+ Added a _description for the event.track model to avoid it being
replaced by inherited descriptions.
bzr revid: odo@openerp.com-20140225115742-ghnt3khn6hvycnnw
Mitali Patel