Use of Notification instead of static.

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>
Merge branch 'develop' of github.com:Hete/kohana-validform into develop

Conflicts:
	classes/kohana/notification.php

Signed-off-by: Guillaume Poirier-Morency <guillaumepoiriermorency@gmail.com>