Add the ability to include documentation if present.
Tidy up.
Add some more docs.
Variable names.
Add section titles.
Fold all by default.
Merge branch 'master' into describe-commands
Use soft word-wrap instead of hard.
Need to see the gutter in order to fold sections.
Stop command names from wrapping.
Fill in some short documentation for the builtin commands.
Add missing doc.
Drop top level heading and move all sections up one level.
Obsolete.
Expand preamble.
Mode documentation.
Allow documenting user commands, and hide internal ones.
Document commands.json
Document zpm.
Stop overwriting mode commands.