Patch Notes -- Gathering Storm Launch Update for Vanilla + Rise and Fall

Below are the patch notes for the Gathering Storm Launch Update for the Vanilla game and the Rise & Fall expansion: AI now builds and uses aircraft more effectively. Weaken AI garrisoning if they can use it to take an enemy city. Don't send more than one unit to capture a given unescorted civilian. In non-emergency situations, AI will not trade away more gold per turn than they make excluding trade deals. Improve AI ability to garrison ranged units during city attacks. When AI takes a city, automatically assign a defender. If an AI can take a city this turn, don't try to defend your units first in the process Increase value of picking up resources for unit maintenance. Digging up artifacts in an ally's territory counts as an incursion. Barbarian raid timer now starts as soon as the first unit arrives in range, instead of waiting for the final unit. Allow barbarians to go through unexplored territory as part of an attack. AI will protect units assigned to defend a city from attack while they are trying to get to the city. Increase weighting for Naval Superiority AI trees to focus on building sea units. AI tries to figure out if a city is on the periphery before taking it, avoids jumping into the center of the Empire unless it needs to. Allow AI to levy for defensive purposes. AI now simplifies/focuses trade deals when requesting trades, rather than asking/offering a smorgasbord of items. Correct an issue that was preventing the AI from properly theming artifact collection