Fixed not posting state change notifications for different provisional responses

Ignore-this: e751cc5a9b90a0fc2731cb93a95eb4b9

darcs-hash:20131209174333-56b4d-5af992a1ff5981e40cadb8a0e6e708d6b5787d34
Updated opus codec to version 1.1

Ignore-this: 2cf2ccbc7166d493d04362d92c26745

darcs-hash:20131210093041-56b4d-df459059a28e86082164e3341f535f3073fc041d