Puput

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* Add Wagtail 5.0 support. Drop Wagtail <=4.0 support.
* Add Django 4.2 support.
* Upgrade jQuery to 2.2.4

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* Add Python 3.11 support. Drop Python <=3.7 support.
* Add Django 4 support. Drop Django <3.2 support.
* Apply black.
* Update tox.
* Add markdown to EntryPages.

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* Add Wagtail 4 support. Drop Wagtail <3 support.
* Drop Django <2.2 support.
* Update requirements-test.
* Update tox.
* Fix: include Python 3.10 on setup classifiers.

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* Add Wagtail 3 support.
* Add Python 3.10 support. Drop Python 3.6 support.
* Remove travis.
* Fix tests suite and apply flake8.
* Updated some docs.

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* Add Django 3.2 support. Drop Django <2.2 support.
* Add Wagtail 2.10-2.14 support.
* Add Python 3.9 to travis test matrix.
* Updated some docs.
* Fix circular imports.

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* Add Django 3.0 support. Drop Python 3.5 support.
* Add Wagtail 2.9 support.
* Show authorship on entry page without image.
* Fix duplicate pages on sitemap.