CANADA STOCKS-TSX dives as Ottawa shootings, energy drop hit sentiment

* TSX down 235.64 points, or 1.62 percent, at 14,312.07 * All 10 main index sectors decline * Energy shares slide with price of oil By John Tilak TORONTO, Oct 22 (Reuters) - Canada's main stock index fell hard on Wednesday after a four-day winning streak, hit by news of deadly shootings in Ottawa and a sharp selloff in energy shares after oil prices tumbled. Investors also digested monetary policy commentary from the Bank of Canada. The Canadian central bank dropped any refe