This patch gets rid of the old "special notes" section that was a
dead-end in the documentation and replaces it with a brief header
followed by a dynamically-generated list of tag-specific
documentation. All of this sits underneath the "Hardening Domains"
section.
It also splits the "Deviations" documentation into its own section
because it's quite important for a deployer to review.
The patch also includes a link to video/slides from the Boston
Summit, which provided the latest updates for the project and some
background on how everything fits together.
Change-Id: I1a5e78733c301335fe1bcfcee36cc146d690b841
875f635ab4