Per-key/bucket pair overhead increased from 0.14 to 1.0
Help people better estimate storage and RAM overhead when using
the Bitcask storage engine.
Make breadcrumbs appear in main content column.
Fix broken video links.
The iframe tags are filtered by gollum-site, so they're now blank
divs with a specific class and an id referencing the source URL.
Add TOC and header anchors back in
Restore missing TOC code, add anchor links to headers.
import new site images, css, and js