The setting ADMIN_MEDIA_PREFIX was removed in Django 1.4. I changed the app's settings
file so that it does not depend on the existence ADMIN_MEDIA_PREFIX. If ADMIN_MEDIA_PREFIX does not exist in settings, it uses STATIC_URL for the admin media root url instead.
Merge pull request #3 from waustin/bugfix/admin-media-prefix

Update settings.py to not depend on ADMIN_MEDIA_PREFIX