factor current time into `timecard print`

[radiovisual]

If someone uses the command timecard print, that printout should include the current time factored into the overall time duration.

For example, if you create a new timecard and then clockin at 12:00, and then at 13:00 you run the command timecard print, the timecard shows that you have worked for 0 Hours 0 Minutes 0 Seconds when you have actually been working for 1 hour.