features / compatibility fix / full template set

-context now includes full notice_type object
-website render() now includes context so that short and full messages
may be used.
-website makes  added=datetime.now() at creation instead of auto.
-models.py gets settings from django.conf import settings
-notices context now includes this_month
-view_sender() generates a url to sender and marks notice as seen.
-email templatetags for dynamic headers and footers
-template and email system allows for a more automated notification
system. notice_type.descriptoin should be in the form "has VERB on your
SENDER " then the notice will read "some user has commented on your
post" and notice_settings will read "when some user has commented on
your post"