Move live example to the top of an example section
Region example fine tuning
Bring back a basic region example
Break up each section into separate pages.

With some inspiration and admiration for the git-scm.com Book
stucture.

Create a persistent table of contents to quickly link to
sections.

Sandbox code for separate examples, which simplifies selectors
and JS significantly, which hopefully makes this easier to read.
Add placeholder links, fix up ToC styles