deprecated AgsGroupId

Refactoring

AgsGroupId is deprecated in version 0.4.0 it will be replaced by the AgsRecyclingContainer structure. It's advantages are evident tighter and more intuitive API of AgsAudio, AgsChannel, AgsRecallID, AgsRecall and AgsRunOrder. As the last mentioned class indicates that especially the way you will be able to initializing or doing playback will be affected.