Move legal page into subdirectory.

Makes things work as expected while developing locally.
Add a 'header' include file.
Add 'home' layout. Extends site, includes extra JS.
Remove old layouts and pages.
Include body_id to home layout.
Post layout inherits from site.
Blog page now uses site layout.
Set page title for index page.
Site layout improvements.

Now includes page.body_id, page.title, header include file, and page.extra_js