resource harvesting
	modified:   LibreSTR/AssetManager.cpp
	modified:   LibreSTR/AssetManager.h
	modified:   LibreSTR/CMakeLists.txt
	modified:   LibreSTR/GameObject.cpp
	modified:   LibreSTR/GameObject.h
	modified:   LibreSTR/GameState.cpp
	modified:   LibreSTR/maps/GameMap.cpp
	modified:   LibreSTR/maps/GameMap.h
	modified:   LibreSTR/units/Building.cpp
	modified:   LibreSTR/units/GroundUnitIdentity.cpp
	modified:   LibreSTR/units/GroundUnitIdentity.h
	new file:   LibreSTR/units/HarvestTask.cpp
	new file:   LibreSTR/units/HarvestTask.h
	modified:   LibreSTR/units/MoveTask.cpp
	modified:   LibreSTR/units/MoveTask.h
	modified:   LibreSTR/units/Task.cpp
	modified:   README.md
	modified:   assets/assets.def
	modified:   assets/worker.res