Make the overview page static

The dynamic version no longer renders correctly on GitHub,
apparently due to a Jekyll upgrade.

Fixes #376
Reorder the overview page

Fixes #264
Formatting and ordering tweaks
Add recently added macro docs to the overview

My master was a little out of date when I generated the
static overview.
Merge pull request #379 from retronym/ticket/376-overview

Statify and curate the overview of guides
Merge pull request #378 from xeno-by/master

fights bit rot in macro docs