The old architecture used exceptions in the signal handler
which prevented transactions from running smoothly
and signal handlers from running after Axes handlers.
The new architecture changes the request approach to request flagging
and moves the exception handling into the middleware call method.
This allows users to more flexibly run their own signal handlers
and optionally use the Axes middleware if they want to do so.
Fixes#440Fixes#442
Fixes#389
Remove monkey-patching from the application loader phase
and use the Django authentication stack for lockout signals.
Utilize custom AUTHENTICATION_BACKENDS and MIDDLEWARE with signals
with backwards compatible implementation of features.
Update documentation, configuration and migration instructions
to match the new configuration and improve the code commentation.
Signed-off-by: Aleksi Häkli <aleksi.hakli@iki.fi>
