CANADA STOCKS-TSX hits 2-1/2 week high on U.S. economic data

* TSX up 138.70 points, or 0.90 percent, at 15,477.17 * All of 10 main index sectors advance * Couche-Tard gains on move to buy Sinopec Sales stake * Imperial Metals drops on concerns over costs, project delay By John Tilak TORONTO, Aug 19 (Reuters) - Canada's main stock index jumped to its highest in 2-1/2 weeks on Tuesday as positive U.S. economic data helped push up shares in every major sector. Data showed a rebound in U.S. housing starts in July, while a moderate in