Ajoute une traduction oubliée

Le 'lu/non lu' de fin des articles était en français, non traduit.
Remove mysql_connect deprecated message until we'll use PDO
Hooks added after addFeed and removeFeed actions
Add action tpl var assign on article
FilterProvider, support pour Apache 2.2 et 2.4

Référence :
http://www.lazaruscorporation.co.uk/blogs/arts-tech/posts/upgrading-from-apache-2-2-to-apache-2-4
Merge pull request #360 from Simounet/feature/little-improvements

Feature/little improvements
Merge commit '5ae22c05496a2c182618c0089b0a7e6f7a151056' into multi_user_on_v1.6