Sample updated to run on the gold release.

bar-descirptor.xml: attributes updated to reflect new release changes.
cowbell.qml: file updated to be in sync with the cascades cowbell app.
hellooggvorbis.cpp: changes made to reflect the Cascades API changes.
soundmanager.cpp: updating the degault gain and pitch values from 4.0f
to recommended 1.0f.