Patch 0.7.8 - Megalania AI side character and general AI polish — Isles of Yore Steam update #80910

0.7.8 is live! This patch adds further server performance improvements, adds Megalania as an AI sidecharacter, and tweaks AI behaviour. Performance: * Another batch of gamethread performance optimisations, particularly for the server. AI: * Added the old megalania easter egg as an AI in the prairie and desert after community suggestions. This is a fairly basic model, but fits these biomes well and adds some variety. Because the current model isn't on the same quality level as the other animals, we're keeping the spawn count for these low on official servers. Server owners should reset their world config. * AI now threaten calls during attack chase. * AI now has a small attack timeout when changing attack/defend target, to make combat a bit fairer and reduce the amount of 360 noscope instakills.