asset-gesture-like-thumbs-up.svg
  https://www.svgrepo.com/svg/421044/gesture-like-thumbs-up
  License: CC Attribution
  Author: Artemy
  Author web site: https://svgsprite.com

asset-table-of-contents.svg
  https://www.svgrepo.com/svg/530401/table-of-contents
  License: CC0

toc-graphic.png
  http://pypi.org/project/sphinx-external-toc
  Author: Chris Sewell
  Author email: chrisj_sewell@hotmail.com
  License: MIT

toc_tree.pptx <-- what is this? Not linked anywhere
  http://pypi.org/project/sphinx-external-toc
  Author: Chris Sewell
  Author email: chrisj_sewell@hotmail.com
  License: MIT

sphinx-external-toc-strict-logo.*
  http://pypi.org/project/sphinx-external-toc-strict
  Author: Dave Faulkmore
  Chat: https://mastodon.social/@msftcangoblowme
  License: Apache 2.0
