Create: Data Session Library

This library was created for give global access to controllers to
session information.
Create: Error System

This personalize system for errors use a controller, but in redirects,
the url is affected (I don't want this).
How can I call another controller without touch in URL?! Or this system
can't be based in a controller?
Update: Account

- Re-write account controller.
- Litle changes in account model.