[v1.0.4-1.0.5] Go to Landmark

[Zizzo]

Our regular users may have noticed a bit of weirdness with landmark detection in Tradewind_Rider's new Age of Allure campaign — on the worldmap, for instance, the Bluethrop Mines zone entrance is listed in the "Level exits" section. Turns out Age of Allure is doing some clever stuff with its zone-change and level-change landmarks (sometimes, for instance, where they take you is determined on the fly based on your quest state) that we didn't know how to detect.

Well, I've taken a stab at it, scraping what I can out of the grids' .change_level_check() method, so v5h, just released, should get it right more often.