Docs: Add docs for wishlists app

docs/source/ref/apps/index.rst

@@ -21,4 +21,5 @@ Oscar is split up in multiple, mostly independent apps.
    promotions
    search
    shipping
-   voucher
+   voucher
+   wishlists

docs/source/ref/apps/wishlists.rst

@@ -0,0 +1,25 @@
+=========
+Wishlists
+=========
+
+The wishlists app is built to allow a user create one or more wishlists and let
+her add products to one or more of her wishlists. She can add a product from the
+product's detail page and manage the lists in the account section.
+
+The wishlists app is hence wired up as a subapp of :doc:`customer` and a partial
+is included in `add_to_basket_form.html`.
+
+Please note that wishlists currently only work for authenticated users.
+
+
+Abstract models
+---------------
+
+.. automodule:: oscar.apps.wishlists.abstract_models
+    :members:
+
+Views
+-----
+
+.. automodule:: oscar.apps.customer.wishlists.views
+    :members: