I am not going to try to make the reference manual compile nicely
under github, but just generate html and put it on a web page.
Mathjaxify display math.
Inline markup.
Punctuation.
Pandocerize the footnotes.
Draft a style for the manual.
The documentation entries are a definition list, no really.
Engage the style sheet; play with spacing.
And now I have a title and a table of contents.  I am not entirely
sure this is how I want it, but it seems to be an improvement.
Touchup.
More style: larger font and narrower column for legibility.
Right.  I need to declare a language for hyphenation to work.