Add shop as a fixed property (#49)

* Add shop field (from properties)

* Update template

* Implement description in BaseModel and then consist

* Make notes internal only

* Fix a merge issue

ram/bookshelf/admin.py

@@ -276,8 +276,8 @@ class CatalogAdmin(SortableAdminBase, admin.ModelAdmin):
             "Publication Year",
             "Description",
             "Tags",
-            "Purchase Date",
             "Shop",
+            "Purchase Date",
             "Price ({})".format(get_site_conf().currency),
             "Notes",
             "Properties",