The Item and Building structs are now going to be classes with their own $.$h and $.$cpp files.

We are adding three new functions to source.cpp:

void saveBuildings$($const std::string& saveFile, const std::vector& blueprints$)$;

std::vector loadBuildings$($const std::string& loadFile$)$;

Building randomBuilding$($const std::vector& blueprints$)$;

Most of the other functions are being moved to the classes. The only exception is the $$findBuilding$$ function.