Updated _Footer (markdown)
Created _Footer (markdown)
revert changes to typography section
update navigation section
edit part of a11y section
edit language support section
edit user experience section
edit enhanced typography section
rewrite structured document section
update first para of "why switch?"
rewrite first para of introduction
update abstract
update authors and date
aside element was disappearing
Created Website Redesign 2018 (markdown)
Updated Home (markdown)
Updated Website Organization (markdown)
Updated EPUB 2 sunset (markdown)
Another pass on the doc. A number of minor changes and tweaks.