Refactored the LAME interop.

CUETools.Codecs.LAME/Interop/MpegMode.cs

@@ -0,0 +1,13 @@
+namespace CUETools.Codecs.LAME.Interop
+{
+    /* MPEG modes */
+    public enum MpegMode : uint
+    {
+        STEREO = 0,
+        JOINT_STEREO,
+        DUAL_CHANNEL,	 /* LAME doesn't supports this! */
+        MONO,
+        NOT_SET,
+        MAX_INDICATOR	 /* Don't use this! It's used for sanity checks. */
+    }
+}