Update copyright year in built documentation We've made changes to documentation this year, but neglected to update the copyright year in the footer of built docs, so do that now.
Drop redundant master_doc setting from Sphinx conf The master_doc option to Sphinx already defaults to looking for a document named "index" so it's unnecessary to set explicitly in our case. Clean it up.
Drop section numbering from documentation builds Sphinx section numbering leads to confusing output, particularly for the rendered ChangeLog. Remove it. Update copyright year in the LICENSE as this is the first change of the new year, and similarly update it in rendered documentation footers as this is the first documentation change of the year.
Use generic authors for copyright shown in docs Adjust the copyright holder listed in the Sphinx-built documentation to match the more general "mudpy authors" used in copyright headers for files.
Add 2019 to copyright for docs and license A new year is upon us, and changes committed in 2019 warrant increasing the copyright range for documentation and the full license text to indicate that.
Add navigation links to Sphinx config Similar to the project URLs in the Python package configuration, include some useful hyperlinks in the Sphinx Alabaster sidebar for things like code browsing/cloning, bug reporting and release files.
Reorganize Sphinx config For improved manageability, sort the contents of the Sphinx conf.py file alphabetically, and switch to the same indentation style as the rest of the codebase.
Generalize copyright headers in files Since we're distributing an AUTHORS file even in wheel packages now replace the specific copyright strings with ones which generally mention "mudpy authors" instead, refer to the AUTHORS file and Git history from the LICENSE file, and embed the generated list of authors in rendered versions of the license.
Add Sphinx configuration Configuration for using Sphinx to build the mudpy documentation suite/site.