fixes #712 - multi-version grouping

MediaBrowser.Model/Dto/BaseItemDto.cs

@@ -500,7 +500,7 @@ namespace MediaBrowser.Model.Dto
         /// </summary>
         /// <value>The part count.</value>
         public int? PartCount { get; set; }
-        public int? AlternateVersionCount { get; set; }
+        public int? MediaVersionCount { get; set; }
 
         /// <summary>
         /// Determines whether the specified type is type.

MediaBrowser.Model/Dto/MediaVersionInfo.cs

@@ -5,7 +5,7 @@ namespace MediaBrowser.Model.Dto
 {
     public class MediaVersionInfo
     {
-        public string Id { get; set; }
+        public string ItemId { get; set; }
 
         public string Path { get; set; }
 
@@ -24,5 +24,7 @@ namespace MediaBrowser.Model.Dto
         public List<MediaStream> MediaStreams { get; set; }
 
         public List<ChapterInfoDto> Chapters { get; set; }
+
+        public bool IsPrimaryVersion { get; set; }
     }
 }