This update includes a simpler addItem() to the wheel, an updateItem() to
the wheel, and a dynamic removeItem() of any item selected and not just the
last item that was created. I still need to figured out the end case when
there is nothing in the pie, but I can at least push it out to some people
and they can tell me what to do with it!

Signed-off-by: knennigtri <knennig213@gmail.com>