1. 官方文档
http://django-userena.readthedocs.org/en/latest/index.html
2. Step-by-Step Guide on Configuring Django-Userena
Before I part, to style your Django-Userena app, copy all the files in the userena/templates folder into your project’s /templates folder. This post gives a very good explanation on how to override a view from an external Django app.
3. add 'django.contrib.sites' to INSTALLED_APPS, and SITE_ID= 1(any integer)
