“ Cheff first contends that contempt proceedings in the Court of Appeals which stem from administrative law enforcement proceedings are civil, rather than criminal, in nature. This may be true where the purpose of the proceeding is remedial. Cf. Shillitani v. United States, 384 U.S. 364, 86 S.Ct. 1531. Within the context of the question before us, however, the contention is irrelevant, for a jury trial is not required in civil contempt proceedings, as we specifically reaffirm in Shillitani, supra. In any event, the contention is without merit. ”