Add basic CSV export, mac db update

inventory/__init__.py

@@ -74,6 +74,11 @@ app = rio.App(
             url_segment='out',
             build=pages.CheckoutPage,
         ),
+        rio.ComponentPage(
+            name="ExportPage",
+            url_segment='export-page',
+            build=pages.ExportPage,
+        ),
     ],
     # You can optionally provide a root component for the app. By default,
     # a simple `rio.PageView` is used. By providing your own component, you