[WIP] redis ad dependency (predis, snc/RedisBundle), collects statistics

This PR is intended to give a sort of statistics #32.

simple solution, when a listener it store on redis calling this function

https://github.com/liuggio/badge-poser/blob/9eadf0617c212e2a58a5a27ffb3fdbac92caee05/src/PUGX/BadgeBundle/Service/Statistic/PersisterInterface.php