* Add basic Sphinx configuration.
* Translate documentation to Sphinx .rst
* Add doc/_build to gitignore.
* Rename requirements.rst back to .txt.
* Fix HTMLFormFiller reference.
* Caption the toctree sections.
* Switch to the RTD Sphinx theme.
* Add API documentation.
* Dowgrade Sphinx to 7.4 for sphinx-rtd-theme.
* Update Read the Docs badge to point to genshi-edgewall.readthedocs.org.