Added hint for XML metadata creator to know which kind of

media the image represents.

DiscImageChef.DiscImages/ImageInfo.cs

@@ -32,6 +32,7 @@ namespace DiscImageChef.ImagePlugins
         public string driveManufacturer;
         public string driveModel;
         public string driveSerialNumber;
+        public XmlMediaType xmlMediaType;
     }
 }