to match new specs, removed unnecessary CSS.
Also added a sent field on mail mail statistics, to be able to count the
number of really sent emails.
bzr revid: tde@openerp.com-20140317160919-7sx7ja28zaxid67t
Added delivered field, number of delivered emails
Improved kanban view of mass mailing campaign
Improved statistics of segments, now daily instead of monthly
bzr revid: tde@openerp.com-20130910104623-7ljg0q9pebbcqk7m