Add documentation and source

Added documentation, source and extra files.

source/templating/demonstration/views/inheritance.py

@@ -0,0 +1,8 @@
+from annoying.decorators import render_to
+from django.http import HttpRequest
+
+
+@render_to("demonstration/inheritance/base.html")
+def view_inheritance_base(request: HttpRequest) -> dict:
+    """Show the list of all sections."""
+    return {}