add demo project readme

django_example_project/README.md

@@ -0,0 +1,17 @@
+# Example Django Project
+
+
+```bash
+git clone 'https://github.com/ArchiveBox/pydantic-pkgr'
+cd pydantic-pkgr
+
+pip install -e .             # install pydantic_pkgr from source
+
+cd django_example_project/   # then go into the demo project dir
+
+./manage.py makemigrations   # create any migrations if needed
+./manage.py migrate          # then run them to create the demo sqlite db
+./manage.py createsuperuser  # create an admin user to test out the UI
+
+./manage.py runserver        # then open http://127.0.0.1:8000/admin/
+```