Upgraded Protobuf, and added api support for it

MediaBrowser.Model/DTO/VideoInfo.cs

@@ -1,18 +1,31 @@
 using System.Collections.Generic;
 using MediaBrowser.Model.Entities;
+using ProtoBuf;
 
 namespace MediaBrowser.Model.DTO
 {
+    [ProtoContract]
     public class VideoInfo
     {
+        [ProtoMember(1)]
         public string Codec { get; set; }
+
+        [ProtoMember(2)]
         public int Height { get; set; }
+
+        [ProtoMember(3)]
         public int Width { get; set; }
+
+        [ProtoMember(4)]
         public string ScanType { get; set; }
 
+        [ProtoMember(5)]
         public VideoType VideoType { get; set; }
 
+        [ProtoMember(6)]
         public IEnumerable<SubtitleStream> Subtitles { get; set; }
+
+        [ProtoMember(7)]
         public IEnumerable<AudioStream> AudioStreams { get; set; }
     }
 }