Comment 1 for bug 307680

I think this is a neat feature. I've started the work on this, by seperating out
the repeating event XUL stuff to a seperate overlay.
The overlay is being included, but the JS is not yet ready. There are lots of
things to think about in terms of dates that I don't want to get into, so I'm
moving this off to a future release, and sending it to <email address hidden> in
case someone else wants to take it on.