Django-simple-history

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- Add ability to cascade delete historical records when master record is deleted (gh-440)
- Added Russian localization (gh-441)

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- Add pre and post create_historical_record signals (gh-426)
- Remove support for ``django_mongodb_engine`` when converting AutoFields (gh-432)
- Add support for Django 2.1 (gh-418)

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- Add ability to diff ``HistoricalRecords`` (gh-244)

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- Add ability to specify alternative user_model for tracking (gh-371)
- Add util function ``bulk_create_with_history`` to allow bulk_create with history saved (gh-412)

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- Fixed out-of-memory exception when running populate_history management command (gh-408)
- Fix TypeError on populate_history if excluded_fields are specified (gh-410)

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- Add ability to specify custom ``history_reason`` field (gh-379)
- Add ability to specify custom ``history_id`` field (gh-368)
- Add HistoricalRecord instance properties ``prev_record`` and ``next_record`` (gh-365)
- Can set admin methods as attributes on object history change list template (gh-390)
- Fixed compatibility of >= 2.0 versions with old-style middleware (gh-369)