Django-extensions

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Changes:

- Fix: setup.py, do not include `typing` requirement in recent versions of Python
- Improvement: shell_plus, add support for using -- to pass cli argument directly to underlying python shell implementation
- New: generate_password, Generates a new password based on `BaseUserManager.make_random_password`

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Changes:

- Fix: runserver_plus, for 1.11 still using MIDDLEWARE_CLASSES
- Fix: show_urls, Fix display in Django 2.0
- Fix: validate_templates, remove realpath in validate_templates
- Fix: sqldiff, bug with including proxy models in sqldiff output
- Improvement: shell_plus, allow configurating of sqlparse formatting and pygments formatting
- Improvement: shell_plus, add collision resolvers based on app label
- Improvement: shell_plus, automatic importing of subclasses defined in SHELL_PLUS_SUBCLASSES_IMPORT
- New: reset_schema, simple command to recreate public schema in PostgreSQL
- Docs: fix links to Werkzeug documentation

Changes:

- Fix: foreignkey_searchinput, remove unnecessary img tag
- Fix: sqldiff, fix deprecated get_indexes call
- Fix: AutoSlugField, check that any non-callable value passed to populate_from is a string type
- Fix: tests, fix ChangingDirectoryTests: cd back in tearDown
- Fix: show_template_tags, should handle AppConfig class in INSTALLED applications
- Improvement: runserver_plus, reduce reraise pollution in traceback page
- Improvement: dumpscript, prevent many2many field with custom intermediate models to be added directly on the parent model
- Docs: fix typos

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Changes:

- Fix: runserver_plus, fix for Django 2.0 middleware handling
- Fix: shell_plus, fixed app_name resolving
- Fix: AutoSlugField, deconstruct did not match construction values
- Fix: runjob, not compatible with apps that use AppConfig in INSTALLED_APPS
- Improvement: runserver_plus, added configuring paths to certificates
- Improvement: sample.py template, add newline to avoid linter warnings
- Improvement: jobs, add integration tests for runjob and runjobs management commands
- New: merge_model_instances, new management command for de-duplicating model instances

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Changes:

- Fix: show_urls, fix for Django 2.0 (Locale URL Resolvers are still broken)
- Fix: runserver_plus, fix rendering of ipv6 link
- Improvement: validate_templates, allow relative paths
- Improvement: validate_templates, automatically include app templates
- Improvement: pip_checker, could not find some packages
- Docs: shell_plus, `--print-sql` usage clearification

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This release add checking types with MyPy to the test suite. At this point
only a few lines of code are explicitly typed.

Changes:

- Improvement: shell_plus, Collision resolver implemented.
- Improvement: shell_plus, Skipping all models importing feature added.
- Improvement: runscript, Script execution directory policy feature added.
- django-extensions now requires the [typing](https://pypi.python.org/pypi/typing) package.