Re-org of imports and site.cfg
Sorts images by date (newest first)...

Also:
- Styles body links, navigation.
- Adds Mozilla Public License
- Obtains EXIF or file system date if JSON not available
- Expands content of about page
- Moves prev/next navigation into image-listing.tpl from layout.tpl
- Adds getpid call into layout.tpl (curious about passenger deployment)