Add sphinx based docs

docs/source/django_admin.rst

@@ -0,0 +1,19 @@
+Django Admin
+------------
+
+To display ``LocalizedFields`` as a tab bar in Django Admin; inherit your admin model class from ``LocalizedFieldsAdminMixin``:
+
+.. code-block:: python
+
+    from django.contrib import admin
+    from myapp.models import MyLocalizedModel
+
+    from localized_fields.admin import LocalizedFieldsAdminMixin
+
+    class MyLocalizedModelAdmin(LocalizedFieldsAdminMixin, admin.ModelAdmin):
+        """Any admin options you need go here"""
+
+    admin.site.register(MyLocalizedModel, MyLocalizedModelAdmin)
+
+
+.. image:: _static/django_admin_widget.png