Fixed a bug with flash messages

Bug was present when flash messages were of varying height

Signed-off-by: Marcin Wiatr <mail.wichura@gmail.com>
Moved mata to its own folder

Created a copy of the folder structure for mata, re-routed controllers and views.

Mata should be extremely easy to add to any project now, similar to using an extension in Yii.

Signed-off-by: Marcin Wiatr <mail.wichura@gmail.com>