Refactor: split code into several django apps (we call them modules).

dav_events/templates/dav_events/emails/password_set.txt

@@ -1,6 +0,0 @@
-Hallo {{ fullname }},
-
-Benutzername: {{ username }}
-Passwort:     {{ password }}
-
-URL:          {{ base_url }}{% url 'dav_events:home' %}