[FIX] {base_action_rule,calendar,hr,mail,project_issue}: decorate the method `message_post` to specify signature
[FIX] wek_kanban_gauge: use field raw_value to avoid thousands separator etc.
[IMP] website_blog: group the get_discussion in one request(get_discussionS), that will avoid to make one request by paragraph in blog.
[IMP] crm: Add Campaign source and medium in group by + fix a bug when name_search return a tuple and not only the id.
Merge remote-tracking branch 'odoo/8.0' into develop