This hasn't been used since at least 2015. It's unmaintained and should not be used for new projects. Take a look at the registration Django Packages grid for (much) better alternatives.
In order to allow the use of custom user models, this app doesn't provide any data by itself. Instead, it relies on the user to provide the user registration form, and then it tries to bind that data to the installed user model. Also, as the original django-registration project, no default templates are given.
Documentation can be found at http://django-signup.readthedocs.org/
Felipe Bessa Coelho (@fbcoelho)