An initializer file has been created here: config/initializers/rolify.rb, you can change rolify settings to match your needs. Defaults values are commented out.

A Role class has been created in app/models (with the name you gave as argument otherwise the default is role.rb), you can add your own business logic inside.

Inside your User class (or the name you gave as argument otherwise the default is user.rb), rolify method has been inserted to provide rolify methods.