Added DatePicker to CreateVC.

It’s awkwardly large, and you can’t resize it. We might be able to use
a scroll view, or just put it on a separate screen. We’ll also probably
want to restrict the minimum date to the current time.
Improve spacing on date picker, saves startTime in COVGame as NSDate.
Confirm&InactiveVCs display days/hours to start.

I think the spacing is mostly okay for the VCs I changed, but we’ll
want to change a lot of it in making the UI nice. Also, adding a scroll
view has tolerably fixed the keyboard-covering-typing issue.