The .PTN functions, vector functions, and egc_copy_rect_1_to_0_1()
(finally!) from TH01, as well as playfld.hpp from all games(finally!),
together with a bunch of other functions in their vicinity.
Part of P0201, funded by Ember2528 and Yanga.
The .BOS freeing funtions, others that are close to them in the typical
#include order, and the ending picture functions.
Part of P0198, funded by Lmocinemod and Ember2528.