attendance = Attendance.new("http://www.zusaar.com/event/2947012")
attendance.limit
attendance.accepted
attendance.waiting
attendance = Attendance.new("http://connpass.com/event/4852/")
attendance.limit
attendance.accepted
attendance.waiting
attendance = Attendance.new("http://devlove.doorkeeper.jp/events/7808")
attendance.limit
attendance.accepted
attendance.waiting