Coltrane

- Add `pubdate` to RSS feed [61](https://github.com/adamghill/coltrane/pull/61) by [Tobi-De](https://github.com/Tobi-De).
- Support setting a custom `TIME_ZONE`.

- Create example `Dockerfile` and `gunicorn.conf.py` files for easier deployments of `coltrane` apps.
- [Add the ability](installation.mdextras) to use [JSON5](https://json5.org) for data files.

**Breaking changes**

- Remove loading `data.json`. All data should be in JSON files in the `data` directory.
- The default markdown renderer is now `mistune` instead of `markdown2`. The next version of `coltrane` will remove the option to use `markdown2`.

- Add `COLTRANE_IS_SECURE` [env variable](env.mdcoltrane_is_secure).
- Add `django.middleware.gzip.GZipMiddleware`, `django.middleware.http.ConditionalGetMiddleware`, `django.middleware.csrf.CsrfViewMiddleware` middlewares.

- [`django-unicorn`](https://www.django-unicorn.com) integration.
- Fix: Passing `INSTALLED_APPS` into `init` now does not override the default apps.

- Add `DISABLE_WILDCARD_TEMPLATES` setting.
- Add `data`, `slug`, `template`, and `now` to direct HTML template for as much parity to `markdown` content as possible.

- Support directory wildcards.
- Add `paths` template tag.