Added User welcome message.
Added templates/soc/mail/welcome.html as a template for the message.
Also fixed a cyclic import that was about to happen in notifications.py.
include AUTHORS
include INSTALL
include LICENSE
recursive-include docs *
recursive-include scripts *
recursive-include django/conf/locale *
recursive-include django/contrib/admin/templates *
recursive-include django/contrib/admin/media *
recursive-include django/contrib/comments/templates *
recursive-include django/contrib/sitemaps/templates *