Cuetools.Converter.exe: support for --decoder-option parameter.

Implemented "Stream" option in BDLPCM Reader to make it possible to select
the right stream in m2ts file.

CUETools.TestHelpers/NoiseAndErrorsGenerator.cs

@@ -49,6 +49,8 @@ namespace CUETools.TestHelpers
 			this.nextError = 0;
 		}
 
+        public AudioDecoderSettings Settings { get { return null; } }
+
 		public NoiseAndErrorsGenerator(long sampleCount)
 			: this(AudioPCMConfig.RedBook, sampleCount, 0, 0, 0)
 		{