Create basic living room space out of basic unity objects

src/RollABall/Assets/Scenes/LivingRoomDemo.unity

src/RollABall/Library/InspectorExpandedItems.asset

src/RollABall/Library/ShaderCache.db

src/RollABall/Library/assetDatabase3

...Library/metadata/a6/a681aa7d8924049d38b82a245ef9fd20.info

...RollABall/Library/shadercompiler-UnityShaderCompiler0.log

src/RollABall/ProjectSettings/TagManager.asset