barrack code
	modified:   LibreSTR/AssetManager.cpp
	modified:   LibreSTR/AssetManager.h
	modified:   LibreSTR/gui/UnitInfoPanel.cpp
	modified:   LibreSTR/gui/UnitInfoPanel.h
	modified:   LibreSTR/units/CreateUnitJob.cpp
	modified:   LibreSTR/units/Unit.cpp
	modified:   LibreSTR/units/Unit.h
	modified:   assets/assets.def
	new file:   assets/barrack.res
	new file:   assets/barrack_icon.png