minor: optimize permissions queries
Closes #298 (closed)
This MR potentially introduces breaking changes for custom LDPPermissions
subclasses
Made this a minor
update to reflect that
Documentation:
- release notes have overview of changes & what it means for package developers
- LDPPermissions guide now has a new section for writing
FilterBackends
to be used in theLDPViewSet
nested serializer
DjangoLDP-Circle tests at least are failing, and other packages which use custom permissions classes will need some changes too