Furomon

- Rebuild theme assets, for main release.

- Clarify expectations around sidebar customisation.
- Declare plugin information to pacify Sphinx's "are you parallel" check.
- Disable sidebar-follows-you-as-you-scroll Javascript.
- Fix scrollbar styles affecting document body.
- Tweak colors for problematic content.
- Tweak how words wrap in sidebar title.
- Tweak spacing in API documentation.
- Tweak wrapping of text in API function/class signatures.

- Add styling for rubrics.
- Add styling for scrollbars, to make them match the theme.
- Fix bottom-of-page JS conditional.
- Fix stability of resources hashes. (thanks [dvarrazzo](https://github.com/dvarrazzo))
- Fix styling for multi-term definition lists items.
- Re-add our development documentation kitchen-sink.
- Tweak how ToC sidebar handles scrollbars.
- Tweak styling for basic definition lists.

- Fix search page. It had become non-operational, due to changes to JS
in the previous release.

- Add properly documented mechanisms for customising the sidebar.
- Add dedicated styling for ethical ads.
- Tweak how JS scripts are loaded.

- Add a separate file for CSS that affects other Sphinx extensions.
- Add content to all the existing pages in documentation.
- Clarify that Furo is biased toward smaller documentation sets.
- Clarify that logo files need to be in `html_static_path`
- Improve various explanations in documentation.
- Tweak borders inside tables.
- Tweak bottom spacing on right sidebar.
- Tweak CSS and JS blocks in `base.html` template.
- Tweak how captions for toctrees look.
- Tweak spacing on sidebar ad on Read the Docs.