Adding VA simplest scene possible (for quick setup and testing)

applications/VirtualAcoustics/VA/itaVA_simplest_scene.m

+itaVAq;
+va.reset;
+va.setOutputGain( .25 );
+va.addSearchPath( pwd );
+ita_write_wav( ita_demosound, 'ita_demosound.wav', 'overwrite' );
+X = va.createAudiofileSignalSource( 'ita_demosound.wav' );
+va.setAudiofileSignalSourcePlaybackAction( X, 'play' )
+va.setAudiofileSignalSourceIsLooping( X, true );
+S = va.createSoundSource( 'itaVA_Source' );
+va.setSoundSourcePosition( S, [ 0 1.7 -2 ] );
+va.setSoundSourceSignalSource( S, X );
+H = va.loadHRIRDataset( '$(DefaultHRIR)' );
+L = va.createListener( 'itaVA_Listener', 'default', H );
+va.setListenerPosition( L, [ 0 1.7 0 ] );
+va.setActiveListener( L );
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