TRUST INDENTURE DATED AS OF THE 26TH DAY OF AUGUST, 2009 AMONG BAYTEX ENERGY TRUST, AS ISSUER AND BAYTEX ENERGY LTD., BAYTEX OIL & GAS LTD., BAYTEX ENERGY PARTNERSHIP, BAYTEX MARKETING LTD. AND BAYTEX ENERGY USA LTD., AS GUARANTORS AND VALIANT TRUST...