 "Governmental land-use regulation may under extreme circumstances amount to a 'taking' of the affected property.See, e.g., "Williamson County Regional Planning Comm'n v. Hamilton Bank", 473 U.S. 172, 105 S.Ct.3108, 87 L.Ed.2d 126 (1985); "Penn Central Transportation Co. v. New York City", 438 U.S. 104, 98 S.Ct.