unit vision, need to do vision on building
	modified:   LibreSTR/GameObject.cpp
	modified:   LibreSTR/GameState.cpp
	modified:   LibreSTR/maps/GameMap.cpp
	modified:   LibreSTR/maps/GameMap.h
	modified:   LibreSTR/maps/PlayerMap.cpp
	modified:   LibreSTR/maps/PlayerMap.h
	modified:   assets/worker.res