Updating HelloOggVorbis sample to run on the gold SDK release.

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