* Update docs build config * Specify Sphinx and theme versions in docs/requirements.txt (tox had been using latest; RTD had pinned older versions) * Update docs builds for Python 3 and recent Sphinx * Remove obsolete sphinx-rtd-theme patches * Add .readthedocs.yml * Move some JS to async (now that Sphinx supports that) * Fix version-alert.js for async loading * Remove docs versionadded/changed info older than v3.0 * Fix broken GitHub issue links in changelog (never worked?) * Add setup long_description_content_type * Drop poorly maintained AUTHORS.txt (just point to GitHub contributors page)
* Set up tox for testing supported Django/Python combinations * Also include tox env for checking and building docs * Use tox-travis for Travis CI integration * Add tests against Django master * Document building docs and running tests with tox
