- When there are less than 5 players, and we're near the discard threshold, prefer
hinting over discarding, even if there are known useless cards.
- We now ask questions like "what's the first playable card in this list?"
This means that if a playable card is in the asking player's list,
the player will learn that it's playable, and that every card before
it is not playable.
Additionally, if a player doesn't know of any dead cards in their hand
and there is enough information available, we use this mechanism so that
if the player doesn't have a playable card, they will learn about one
dead card in their hand.
(These were two commits that got joined in a rebase accident, sorry.)
