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)

addons/website_forum/controllers/main.py
if not question.can_view:
            raise werkzeug.exceptions.NotFound()
        
        user = request.env.user
        if question.state == 'pending' and user.karma < forum.karma_post and question.create_uid != user:
            raise werkzeug.exceptions.NotFound()
        
        question.sudo().set_viewed()
        if question.parent_id:
            redirect_url = "/forum/%s/question/%s" % (slug(forum), slug(question.parent_id))
            return werkzeug.utils.redirect(redirect_url, 301)
        filters = 'question'
        values = self._prepare_forum_values(forum=forum, searches=post)
        values.update({
            'main_object': question,
            'question': question,
            'can_bump': (question.forum_id.allow_bump and not question.child_ids and (datetime.today() - datetime.strptime(question.write_date, tools.DEFAULT_SERVER_DATETIME_FORMAT)).days > 9),
            'header': {'question_data': True},
            'filters': filters,
            'reversed': reversed,
        })
        return request.website.render("website_forum.post_description_full", values)
    @http.route('/forum/<model("forum.forum"):forum>/question/<model("forum.post"):question>/toggle_favourite', type='json', auth="user", methods=['POST'], website=True)
    def question_toggle_favorite(self, forum, question, **post):