McKellen, Coel shine in art drama

   Ian McKellen probably could read your tax return and make it sound as if Shakespeare had written it. The 86-year-old British actor has a voice that can mellow like aged wine or cut as sharply as a newly stropped razor.   In an age of mumbled, half-whispered dialogue, McKellen delivers the written word with a theatrical precision that's perfectly suited to director Steven Soderbergh's The Christophers, a movie in which McKellen plays Julian Sklar, an aging but once prominent painter.   Time...