updated some scenario titles
added two scenarios for event status
removed 'marked' wording when referring to attendee check-in/out status
removed event organizer login requirement from attendee reg background
added two scenarios for submitting attendee registrations
clarified a step in scheduling pre-registration
added scenario to notify waitlisted attendees when they can be checked in
added scenario to connect attendee information to a new user account
added scenarios concerning information reuse for attendee registration