'Add new Notification to Registration message
:param string name: Notification Name
:param boolean enabled: Enable this notification by default'

def add_notification(self, name, enabled=True):

    notice = {}
    notice['Notification-Name'] = name
    notice['Notification-Enabled'] = enabled
    self.notifications.append(notice)
    self.add_header('Notifications-Count', len(self.notifications))
