* 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
Fixes#784
From now, searching for tags with an empty value will return only not tagged links,
with the search bar showing `x results [not tagged]`.
Note that using the api, the searchtags request parameter must be set to `false` to get the same result.
- [ ] Update API doc
Use php-intl extension to display datetimes a bit more nicely, depending on the locale.
What changes:
* the day is no longer displayed
* day number and month are ordered according to the locale
* the timezone is more readable (UTC+1 instead of CET)
