feature: added AllowRequestedCORSMiddleware
What
added middleware which returns the HTTP_ORIGIN of the request as an Allowed origin for CORS. Replaces the use of the ViewSet dispatch for this purpose
Why
In a federated/Solid context, we can't use CORS. We always want developers to expose their views to the origin of the request
@balessan I tested and this returns the necessary headers on non-DjangoLDP views e.g. auth/logout/