Add the sphinx extension for integration with documentation builds.
Support note entries that span multiple lines using preformatted syntax in YAML by prefixing the list entry with |.
For example:
- |
This entry has two paragraphs.
This is the second.
Change the order of the slug and UUID value in the note filename so the slug comes before the UUID to make tab completion easier to use.
Older files are still supported, and can be renamed to use the new style.