It contains mostly read only information about the current Shaarli instance,
PHP version, extensions, file and folder permissions, etc.
Also action buttons to clear the cache or sync thumbnails.
Part of the content of this page is also displayed on the install page,
to check server requirement before installing Shaarli config file.
Fixes#40Fixes#185
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.
