Javascript/jQuery code that parses a JSON file to answer three questions: 1.  During the month of February 2012, how long is spent on each piece of work? 2.  What if we only count time during the working hours of Mon-Fri, 9am-5pm (Zulu  time)? 3.  How long is spent in total in each ScheduleState (across all pieces of work),  taking account of working hours?