Opponents that finish their turn

Fixed

• Games no longer freeze up while a computer opponent is thinking through its turn.
• Computer opponents can now correctly target spells, embark and disembark fleets, respond to diplomacy offers, and pick a hero's new skill on level-up — previously they could see these actions were available but not the information needed to actually use them.
• AI opponents offered a quest at a temple no longer get stuck forever -- they now answer it (or the game answers it for them) and keep playing.
• The "waiting on an opponent" banner now updates to name each computer opponent as its turn comes up, instead of freezing on the first one while the others quietly finish.