Added model kwarg to SignupView.create_user

Enables sign up for complex user hierarchies. Overriding SignupView
can now dictate the User model through a code path with request
access.

Fixes #188

CHANGELOG.md

@@ -4,6 +4,7 @@
 
  * added Python 3.5 and Django 1.9 compatibility
  * added Japanese translations
+ * added model kwarg to SignupView.create_user enabling sign up for complex user hierarchies
 
 ## 1.2.0
 

account/views.py

@@ -169,8 +169,11 @@ def get_success_url(self, fallback_url=None, **kwargs):
     def get_redirect_field_name(self):
         return self.redirect_field_name
 
-    def create_user(self, form, commit=True, **kwargs):
-        user = get_user_model()(**kwargs)
+    def create_user(self, form, commit=True, model=None, **kwargs):
+        User = model
+        if User is None:
+            User = get_user_model()
+        user = User(**kwargs)
         username = form.cleaned_data.get("username")
         if username is None:
             username = self.generate_username(form)