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
from datetime import datetime
import werkzeug.exceptions
import werkzeug.urls
import werkzeug.wrappers
import json
import lxml
from urllib2 import urlopen, URLError
import base64
import openerp
from openerp import tools, _
from openerp.addons.web import http
from openerp.addons.web.controllers.main import binary_content
from openerp.addons.web.http import request
from openerp.addons.website.models.website import slug
class WebsiteForum(http.Controller):
    _post_per_page = 10
    _user_per_page = 30
    def _get_notifications(self):