prepare Buildings to use Block geometry
prepare Buildings to use Block geometry

hgarnelo/osmbuildings,hgarnelo/osmbuildings,OSMBuildings/OSMBuildingsClassic,faegi/osmbuildings,hgarnelo/osmbuildings,faegi/osmbuildings,kekscom/osmbuildings,faegi/osmbuildings,OSMBuildings/OSMBuildingsClassic,kekscom/osmbuildings