Sphinx-jinja

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* switch test to pytest
* Use jinja_base for debug printing template files
* Add Environment customization for kwargs, filters, tests, globals, and policies
* Refactor debug printing and fix urllib import
* Use debug in tests - currently breaks on 3.7+
* Add CI environments for 3.6, 3.7, 3.8, 3.9, and 3.10
* Add requirements to requirements.txt and setup.py
* Add MIT license file
* README.rst: add debug option
* README.rst: fix formatting

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* update changelog
* Don't let header\_char modify the default config in-place
* Allow parallel builds

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* update changelog
* add github url in home page
* Allow not passing a context (i.e., empty dict)
* Support \`.. include::\` in template

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* Update jinja.py
* Update jinja.py
* Update jinja.py
* Extended jinja.py to make it more useful

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* fix readme

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* Allow jinja directive to use an external jinja template
* fix flake8
* add travisyml
* update readme
* remove changelog from git, as it is autogenerated
* update README
* fix issue with pip install -e