WorkingSet no longer adds extra time

When there was a current project, its time was added twice (once for the
loop through the projects and once for the running_time). The total time
for the current proejct is now subtracted after adding the running_time.
Add normal_daily_hours to WorkingSet

This is used to determine if the total amount of work has gone into
"overtime" (i.e. more than the usual hours per day).