NEW YORK, Oct 17 (Reuters) - Norman Pearlstine, Time Inc.'s editor-in-chief for eleven years, will step down at the end of this year, when he will be succeeded by editorial director John Huey. Pearlstine, 63, will remain with Time Inc. parent Time Warner Inc. (TWX.N: Quote, Profile, Research) as a senior adviser and will continue work on a book scheduled to be published in 2007, the company said...