This adds the baseline infrastructure to account for the Sevii Islands, while also fixing a couple of bugs. Zeta, please read the commit carefully!
Only real issue I noticed was that scrolling on the town map is infinite in all three new regions, implying there's something in `pokegear.asm` I haven't accounted for.
I've also ret'd the ezchat order and gen1 orders out of existence to reduce the sheer amount of 8-bit warnings. This abolishes gen1 compatibility (though this was already a bit fucked) in exchange for actually being able to debug things in a reasonable timeframe.
