** Added jsf exception handler
** Added AuthorizationException and FileNotFoundException exceptions to
be handled by jsf exception handler
** Added Notification class (extends FacesMessage, adds SUCCESS and
LOADING severities)
** Added jsf for notitication queue
** Added styles for notification queue
** Removed Notification and NotificationSeverity classes
** Added script for the notification queue
** Added validation messages for credentiallogin widget
** Fixed bug in notification queue that caused it to block input on
whole screen width instead of just the message area
** Added "logging in ..." message into credentiallogin widget
** Added support for post redirect messages
Merge branch 'devel' of https://github.com/otavanopisto/muikku.git into devel