[ADD] mass_mailing: added forgotten init file

bzr revid: tde@openerp.com-20140317165418-28c33lzbfjnzerel

addons/mass_mailing/models/__init__.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+
+import mass_mailing
+import mail_mail
+import mail_thread
+import email_template
+import res_config