fix some of the font headings (this can be factorized out later)
Further improvements to CSS, and disable external highlighting
Fix panel and callout css, and header sizes to reasonable values
improve code layout by tagging all values with `odoccode` and rendering them separately.

This should let us mark the odoccode with their source code locations too.
Do not initialise hljs
sticky navbar, and fix up the table layouts
add a footer to every page