Fix #277 -- Embeddable shop (#622)

* Vendor vue.js

* Refactor item_group_by_category to support vouchers

* Widget: Show product list

* Widget: free prices

* Widget: pictures and loading indicator

* Widget: First iframe steps

* Widget: Do not rerender iframe

* Widget: Error handling

* Improve widget

* Widget: localization tech

* Fix invoice style

* Voucher attribute and waiting list

* Add some iframe chrome

* First step to namespaced carts

* More isolation steps

* More cart isolation things

* More cart isolation things

* Mobile stuff

* Show cart on checkout pages

* PayPal and Stripe support

* Enable downloads

* Locale handling

* change text "save URL to this exact page"

* Widget: voucher redemption

* Widget: CSS

* CSS: Responsive

* Widget: CSS improvements

* Widget: Add embedding code generator

* Widget: Error messages and SSL check

* First tests

* Widget: tests

* Don't use IDs in widgets

* Widget: static files caching

src/pretix/plugins/paypal/urls.py

@@ -2,12 +2,17 @@ from django.conf.urls import include, url
 
 from pretix.multidomain import event_url
 
-from .views import abort, refund, success, webhook
+from .views import abort, redirect_view, refund, success, webhook
 
 event_patterns = [
     url(r'^paypal/', include([
         url(r'^abort/$', abort, name='abort'),
         url(r'^return/$', success, name='return'),
+        url(r'^redirect/$', redirect_view, name='redirect'),
+
+        url(r'w/(?P<cart_namespace>[a-zA-Z0-9]{16})/abort/', abort, name='abort'),
+        url(r'w/(?P<cart_namespace>[a-zA-Z0-9]{16})/return/', success, name='return'),
+
         event_url(r'^webhook/$', webhook, name='webhook', require_live=False),
     ])),
 ]