generic audioscene and dbap and vbap spatializers
some clean up
Merge branch 'devel' of https://github.com/AlloSphere-Research-Group/AlloSystem into ryan_spatial_audio
Moved some globals to main function. Added comments
more clean up
Merge branch 'ryan_spatial_audio' of https://github.com/AlloSphere-Research-Group/AlloSystem into ryan_spatial_audio

Conflicts:
	allocore/examples/av/helloVirtualWorld.cpp
added switches for distance attenuation and doppler per sound source
spatializer is constructed with speaker layout rather than listener, update helloVirtualWorld example
small audio scene changes
Merge branch 'devel' of https://github.com/AlloSphere-Research-Group/AlloSystem into ryan_spatial_audio
Merge branch 'devel' of https://github.com/AlloSphere-Research-Group/AlloSystem into ryan_spatial_audio
dbap changes and omni hack
fixes for speaker vdc and dbap class
dbap fixes
more efficient per buffer processing for spatializers
per sample and per buffer rendering for audio scene
audioscene and dbap cleanup
efficient dbap loop
DBAP focus changed to 5
dbap efficiency