Initial commit. Basic models mostly done.

venv/lib/python3.8/site-packages/django/contrib/sites/shortcuts.py

@@ -0,0 +1,16 @@
+from django.apps import apps
+
+
+def get_current_site(request):
+    """
+    Check if contrib.sites is installed and return either the current
+    ``Site`` object or a ``RequestSite`` object based on the request.
+    """
+    # Imports are inside the function because its point is to avoid importing
+    # the Site models when django.contrib.sites isn't installed.
+    if apps.is_installed('django.contrib.sites'):
+        from .models import Site
+        return Site.objects.get_current(request)
+    else:
+        from .requests import RequestSite
+        return RequestSite(request)