- First tab at integrating @krl's new index page

File icons are embedded in side icons.css (QmXB7PLRWH6bCiwrGh2MrBBjNkLv3mY3JdYXCikYZSwLED contains both the icons and bootstrap)

- Fix back links (..)  (fixes #1365)

Thanks @JasonWoof for the insight.  The back links now stop a t the root hash and work for links that do and dont end with a slash.

License: MIT
Signed-off-by: Henry <cryptix@riseup.net>