Impacted versions:
Latest Odoo Forum

Steps to reproduce:
Get a nofitication from the Odoo forum (by subscription or by a comment to your posting)

Current behavior:
The notification email contain the subject: "Re: False" and contains no link to the forum post.
Expected behavior:
The notification email contains the title of the forum post and a link to the forum post.
Video/Screenshot link (optional):

![selection_195](https://cloud.githubusercontent.com/assets/1814941/15383579/60b554b0-1d94-11e6-8b1b-875a11e3d82b.png)

request.session['validation_email_done'] = False
        return True
    
    
    @http.route(['/forum'], type='http', auth="public", website=True)
    def forum(self, **kwargs):
        forums = request.env['forum.forum'].search([])
        return request.website.render("website_forum.forum_all", {'forums': forums})
    @http.route('/forum/new', type='http', auth="user", methods=['POST'], website=True)
    def forum_create(self, forum_name="New Forum", add_menu=False):
        forum_id = request.env['forum.forum'].create({'name': forum_name})
        if add_menu:
            request.env['website.menu'].create({
                'name': forum_name,
                'url': "/forum/%s" % slug(forum_id),
                'parent_id': request.website.menu_id.id,
                'website_id': request.website.id,
            })
        return request.redirect("/forum/%s" % slug(forum_id))
    @http.route('/forum/notification_read', type='json', auth="user", methods=['POST'], website=True)
    def notification_read(self, **kwargs):