[jQuery] Add class on click, then remove when click another, and add to that.

[hubbs]

I have a list of links, and when one is clicked, I would like a class
to be added.  I understand how to do this, but when you click another
link, I would like the class removed from the first click and added to
the second click, and so on, so that there is always only one link
with the class applied.

Thanks!