Bugfixes:
* the window showing battle details would be hidden when the turn advanced, even if the pirate fight quest was still active
* the icon above a ship that's engaged in a fight would only be shown for 1 turn when the fight began and would not be shown at all after loading a save where you were already engaged in a fight
* completing a mayor quest when there wasn't a valid place for a building in a town would result in having the building placed at 0,0.
* after fighting a pirate ship, ships could be stuck at sea indefinitely
QoL:
* You can now SELL SHIPS! It's a much-requested feature and a big blind-spot for me, I should have expected & implemented it earlier. Sorries bout that.