Django-extensions

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Changes:

- Fix: show_urls, fix for traceback on multi language sites
- Improvement: reset_db, fix typo's in help test

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Changes:

- New: HexValidator, validate hex strings
- Improvement: reset_db, move settings to `django_settings.settings` which makes it easier to override.
- Improvement: AutoSlugField, extend support for custom slugify function
- Fix: runprofileserver, fix autoreloader for newer Django versions

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Changes:

- New: test, many many more tests :-) thanks everybody
- New: docs, many documentation updates
- New: graph_model, add simple theming support and django2018 theme
- Improvement: ModificationDateTimeField, make modificationfield name modifiable
- Improvement: graph_model, option to not showrelations labels in the graph
- Improvement: reset_db, allow to override list of backends for database engines
- Improvement: reset_db, add psqlextra backend
- Improvement: runserver_plus, idle support
- Improvement: generate_secret_key, removed get_random_string in favour of get_random_secret_key
- Improvement: update_permissions, add create-only and update-only flags
- Improvement: update_permissions, update changed names of permission to match correct permission name
- Improvement: syncdata, add --database option
- Improvement: runscript, allow to override RUNSCRIPT_SCRIPT_DIR
- Fix: create_command, fix mknod error on macos
- Fix: runserver_plus, fix in resolving ssl certificate path
- Fix: sqldiff, fix hstorefield
- Deprecate: truncate_letters, use Django's truncatechars
- Deprecate: passwd, use Django's changepassword
- Deprecate: Keyczar encrypted fields, Keyczar is abandoned / deprecated

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Changes:

- Fix: runserver_plus, auto_reloader fix for compatibility with Django 2.2
- New: test, many many more tests :-) thanks kuter

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Changes:

- New: ipdb, pdb and wdb filters
- Fix: ForeignKeySearchInput, error with widget render(...) parameters on Django 2.1
- Fix: pipchecker, unsupported format string passed to NoneType.format error
- Tests: bunch of new test cases

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Changes:

- Fix: null_technical_500_response, handle function-based middleware
- Fix: shell_plus, fix 1261 check for --notebook-dir=... argument style
- Fix: graph_models, Excluded models displayed as an underscore
- Fix: set_fake_password, requires_model_validation has been replaced with requires_system_checks since 1.9
- Docs: admin_generator, new documentation and examples
- Improvement: JSONField, use new from_db_value syntax on Django 2 and up
- Improvement: EncryptedTextField, use new from_db_value syntax on Django 2 and up
- Improvement: graph_models, add --dot option
- Improvement: graph_models, allow to redirect (text) output to file
- Improvement: sqldiff, better support for indexes, index_together and unique_together