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.Codecs.BDLPCM/BDLPCMReaderSettings.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+
+namespace CUETools.Codecs.BDLPCM
+{
+    public class BDLPCMReaderSettings : AudioDecoderSettings
+    {
+        public BDLPCMReaderSettings()
+        {
+        }
+     
+        [Browsable(false)]
+        public string Stream { get; set; }
+    }
+}