bump version number

relax OrderedModelManager check to a Warning if it returns correct Or…

…deredModelQuerySet

rework cascaded/queryset delete detection to avoid global signal list…

…ener

Restrict signal handler 'senders' to subclasses of `OrderedModelBase` to avoid query count regression due to `Collector.can_fast_delete` logic in `models/deletion.py
fixes #288

update version

release 3.7.1 patch release

release 3se 3.7

add supported DRF versions to README

release 3.5

release 3.4.3

release 3.4.2, update repository link