This uses GNU Octave's CSS, which formats it like a printed manual
using a modern style. It's certainly an opinionated style, but at the
very least, the width is important.
* Makefile.am (MAKEINFOHTML): Include CSS reference.
* liza.css: Add stylesheet.
Texinfo is the documenation format of the GNU operating system and can
produce output in a variety of useful formats, including info, HTML, and
PDF.
The HTML output is of particular importance here, since Liza is a JavaScript
framework.