Various improvements to AI's early game. Simplify some code and improve on other. Add a few different strategies (Rush/normal/boom, quite basic for now, refs #2344).
Aegis should mostly respect tech limitations so I'll ref #1964.
I'm going to go with #2364 is fixed, the AI should be more efficient in early-game, and late-game is a known problem.
Fixes #2274 and fixes #2379.
Refs #2372 as it should fix several of those warnings for AIs.
Fixes #2256 with a new bartering system, in parts taken from mimo's patch.