Sadler's Wells, LondonBeginning by sequencing his own genome, the maverick choreographer has fashioned a show that is mysteriously beautiful and curiously frustratingWayne McGregor's titles are rarely straightforward. Compared with works such as Tetractys, Infra and Obsidian Tear, his latest show, Autobiography, sounds pretty unambiguous. It is however entirely typical of him that the piece owes very little to the co…