AI Improvements — Saratoga Steam update #485811

If tactics cards resulted in a No Combat result, there were some scenarios that would freeze the AI. This update should remedy - if anyone encounters that sort of issue, please send me your saved game. It really helps.Other improvements include a better path choice for the AI and for the player when they use extended movement. The game should choose a more direct path each time.Finally, a bug fix in the AI in which it might choose a retreat path that required a step loss, even when there were other choices available.