Added a note to the README about admin access

README.txt

@@ -70,6 +70,20 @@ Users should now be able to log into your site (and staff into the
 administration interface) using CAS.
 
 
+== Managing Access to the Admin Interface ==
+
+At the moment, the best way to give a user access to the admin interface is
+by doing one of the following:
+
+    * Create the initial superuser account with a username that matches the
+      desired user. `django_cas` will be able to make use of the existing
+      user.
+    * Similarly, create database fixtures for the superusers, and load them
+      when deploying the application.
+    * Ask the user to sign in to the application and, as an admin, log into
+      the admin interface and change their access through the Users table.
+
+
 == Populating User Data ==
 
 To add user data, subclass `CASBackend` and specify that as your