[svn] Add user registration and user profiles.

Used modified versions of django-registration and django-profiles , both on bitbucket.

The Person model is now set up as the profile for auth.User s.

I set up a requestcontext so that settings is automatically passed to every template, no need to repeat ourselves in views. However, this needs to be refined: I will soon change it to only pass a subset of settings. E.G. we do not need to be passing the DB login and password!
Copied from http://cucc@cucc.survex.com/svn/trunk/expoweb/troggle/, rev. 8231 by aaron @ 1/29/2009 11:02 PM

registration/signals.py

@@ -0,0 +1,8 @@
+from django.dispatch import Signal
+
+
+# A new user has registered.
+user_registered = Signal(providing_args=["user"])
+
+# A user has activated his or her account.
+user_activated = Signal(providing_args=["user"])