Washington, D.C.’s Woolly Mammoth theatre has been around for a quarter century without ever managing to settle down. Until now. “After playing for 25 years in churches, reconditioned auto repair shops, borrowed lodgings and places with stage ceilings only 12 feet high, the adventurous theater company today has almost everything its heart could desire. Just in time for tonight’s official opening” at its new home in downtown D.C.