DLNA Didl improvements

MediaBrowser.Dlna/Didl/DidlBuilder.cs

@@ -418,6 +418,10 @@ namespace MediaBrowser.Dlna.Didl
                     {
                         classType = "object.container.person.musicArtist";
                     }
+                    if (item is Series || item is Season || item is BoxSet || item is CollectionFolder)
+                    {
+                        classType = "object.container.album.videoAlbum";
+                    }                  
                 }
 
                 objectClass.InnerText = classType ?? "object.container.storageFolder";