Django-anon-lockout

Adds two new management commands:

- delete_lockout_data: deletes all data associated to the app. This includes all AccessSession, Attempt and Lockout instances being deleted.
- invalidate_lockouts: invalidates all active lockouts.

Changelog

- Removed `LOCKOUT_RESET_TIME`.
- Refactored so that the `failed_in_row` counter only is reset when a lockout connected to the session has expired.
- Increased the default value for `LOCKOUT_THRESHOLD` (from 5 to 100).

This relase of django_anon_lockout includes a simple lockout mechanism for anonymous login attempts.