v1.0.71 — High Seas, High Profits! Steam update #162636

Major optimizations to turn simulation: * autosave is done on a separate thread now and no longer stutters the game * introduced some object pooling on world ships which decreases number of stutters * dramatically improved pathfinding algorithm to almost completely remove end of turn stutters Bugfixes: * explicitly saved game screen mode setting (which is normally managed by the game engine) since it was not implicitly saved for some players Goodies: * new custom map, the Caribbean! This is the most dense map to date, featuring 60 cities! The map is directly inspired by the Port Royale 2 map.