* Update reference docs.
- We now replace instances of https://istio.io with {{site.baseurl}} in imported
reference docs such that the generated site will work properly for staging and for
archive.istio.io
* Fix a bad link.
- Stop using the prism functionality for syntax highlighting since
it doesn't handle embedded links in <pre> blocks, which prevents
cross-linking to type names properly. We now roll our own PRE block
handling.
- Stop drawing a box around inline code elements which substantially improves
the visuals, especially in tables.
- Improve appearance of tables to be a bit cleaner.