RFE: add option to use a 1-12 AM/PM display

[juggledad]

This looks great ...but

1. It would be nice if you could show AM/PM so instead of 14:00 it would show 2:00 PM
2. Having an optinal label for it would be great. so you could have multiple versions for different time zones or what ever else people would wish to display. As it is, you would have to have a ui-text node along with this.