Added custom kernel events

* Added 8 kernel events
* All events class tested
* Fixed some CS
* Updated documentation and added Events docu
* Added phpunit definition file
Travis badge and fixed travis file
Fixed travis badge
Update README.md

Added packagist nb of downloads badge
Update README.md

Updating documentation bundle definition
Updated get to fetch

Replaced get for fetch method. Get... does not exist!
Update README.md

Updated namespace to name on documentation