CANADA STOCKS-Energy shares boost TSX as Fed policymakers to meet

* TSX rises 29.45 points, or 0.20 percent, to 14,560.36 * Five of 10 main index sectors advance * Cameco slips after reporting quarterly results By John Tilak TORONTO, April 29 (Reuters) - Canada's main stock index advanced on Tuesday as a higher oil price drove gains in the energy sector, and as investors awaited the start of a two-day policymaking meeting of the U.S. Federal Reserve for clues on the direction of its monetary policy. The focus will be on the U.S. central ba