* Refactor the documentation build process
Significant improvements:
* Allow easy isolated local builds via a dedicated Tox environment
* Configure Sphinx to use consistent packages and theme across local, CI,
and ReadTheDocs builds; local builds now look the same as the published
RTD pages
* Explicitly add a ReadTheDocs configuration as code, per their documented
best practices
* Remove lots of dead code and simplify the Sphinx configuration file
* Build docs in a dedicated CI step and enable stricter warning checking
* Fix docutils related build error.
* Relax Sphinx version.
* Invalidate RTD build cache.
* No need to combine coverage reporting I think.
* Add combining again.
Co-authored-by: Jannis Leidel <jannis@leidel.info>
project supports Django 1.11+
> https://pypi.org/project/django-discover-runner/
This runner has been added to Django 1.6 as the default test runner.
If you use Django 1.6 or above you don’t need this app.
fix#250
- Drop django==1.9 as it reached end of life
- Drop python2.6, python3.3, and bring python3.6
- Bring django-2.0 in the matrix as expected failure until we add its
support
As per [their blog post of the 27th April](https://blog.readthedocs.com/securing-subdomains/) ‘Securing subdomains’:
> Starting today, Read the Docs will start hosting projects from subdomains on the domain readthedocs.io, instead of on readthedocs.org. This change addresses some security concerns around site cookies while hosting user generated data on the same domain as our dashboard.
Test Plan: Manually visited all the links I’ve modified.
