Mkdocs-gallery

- `examples` folder is not required to be in a subfolder of `docs` anymore. Fixes [54](https://github.com/smarie/mkdocs-gallery/issues/54). PR [#92](https://github.com/smarie/mkdocs-gallery/pull/92) by [Louis-Pujol](https://github.com/Louis-Pujol).

See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.

- Gallery scripts now support top-level asynchronous code. PR [90](https://github.com/smarie/mkdocs-gallery/pull/90) by [pmeier](https://github.com/pmeier)

See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.

- Pyvista can now be used in gallery examples as in `sphinx-gallery`. PR [91](https://github.com/smarie/mkdocs-gallery/pull/91) by [Louis-Pujol](https://github.com/Louis-Pujol)

See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.

- Mayavi can now be used in gallery examples just as in `sphinx-gallery`. PR [69](https://github.com/smarie/mkdocs-gallery/pull/69) by [GenevieveBuckley](https://github.com/GenevieveBuckley)
- Fixed for `README.md` that contains `html` comments. Fixes [85](https://github.com/smarie/mkdocs-gallery/issues/85). PR [#86](https://github.com/smarie/mkdocs-gallery/pull/86) by [AntoineD](https://github.com/AntoineD).


See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.

- `sys.path` modifications now persist across blocks of an example. `sys.path` is still reset after each example. PR [82](https://github.com/smarie/mkdocs-gallery/pull/82) by [Louis-Pujol](https://github.com/Louis-Pujol).

See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.

- Fixed `AttributeError` when `optipng` is installed and used through the `compress_images` option. PR [77]
(https://github.com/smarie/mkdocs-gallery/pull/77) by [Samreay](https://github.com/Samreay)
- Swapped from deprecated `disutils.version` to `packaging.version`. PR [79](https://github.com/smarie/mkdocs-gallery/pull/79) by [Samreay](https://github.com/Samreay)
- Re-raise errors for better ExtensionError messages, so users have full details about the original problem. PR [58](https://github.com/smarie/mkdocs-gallery/pull/58) by [GenevieveBuckley](https://github.com/GenevieveBuckley)

See [documentation page](https://smarie.github.io/mkdocs-gallery/changelog) for details.