Make print_rect_ex a little smarter.
Add the print_frame method
This might be useful.
Early implementation of menus.

A Menu has a List and does other stuff alongside (e.g. has a border, presumably eventually also a label and other stuff).
Also, it turns out parent-relative coordinates was the way to go -- this way, you don't have to keep telling your children "Yo, your daddy just moved around a bit!", which wouldn't have worked all that well anyway.