Game interface time clock

[sgdavis1]

There is a clock in the upper right of the game play interface. We want to use an efficient client side implementation to keep that up to sync. Maybe even just setTimeout()?

Ideally someone will research the best method for this, and then implement it entirely in the following file without any side effects:
public/js/game.js

Note: We have many improvements that we want to make to the "Play" interface. This is a small, well encapsulated one that anyone could implement.