Fixed wrong url in email templates.

dav_events/config.py

@@ -4,7 +4,7 @@ from django.utils.translation import ugettext_lazy as _
 # E-Mails
 ENABLE_EMAIL_NOTIFICATIONS = False
 EMAIL_SENDER = 'Jens Kleineheismann <kleineheismann@kit.edu>'
-BASE_URL = 'http://localhost:8000'
+EMAIL_BASE_URL = 'http://localhost:8000'
 
 # Auth Config
 MANAGE_ALL_GROUP = 'Tourenreferenten'