Found that I sometimes did a misinput which lead to losing a critical
card - implemented a function which asks for confirmation (with a
print out of the cards that will be redealt) before doing the redeal.
We've now got one of the major stages of the game down.
I think it's worth investing in some testing functions now - we've
reached just the level of complexity.
Like REPL stands for Read -> Evaluate -> Print -> Loop, here we
implement a similar loop which reads a set of indices for cards to
remove from the user, redeals those cards then loops back.
This keeps happening until either:
- the user does not want to redeal (empty input)
- there aren't enough cards for a redeal
