With the new routes, all pages are not all at the same folder level anymore
(e.g. /shaare and /shaare/123), so we can't just use './' everywhere.
The most consistent way to handle this is to prefix all path with the proper variable,
and handle the actual path in controllers.
* requires PHP 5.6
* use blazy on linklist since a lot more thumbs are retrieved
* thumbnails can be disabled
* thumbs size is now 120x120
* thumbs are now cropped to fit the expected size
Fixes#345#425#487#543#588#590
