Added support for jsv format output from the api

MediaBrowser.Common/Serialization/JsvSerializer.cs

@@ -0,0 +1,22 @@
+using System.IO;
+
+namespace MediaBrowser.Common.Serialization
+{
+    /// <summary>
+    /// This adds support for ServiceStack's proprietary JSV output format.
+    /// It's based on Json but the serializer performs faster and output runs about 10% smaller
+    /// http://www.servicestack.net/benchmarks/NorthwindDatabaseRowsSerialization.100000-times.2010-08-17.html
+    /// </summary>
+    public static class JsvSerializer
+    {
+        public static void SerializeToStream<T>(T obj, Stream stream)
+        {
+            ServiceStack.Text.TypeSerializer.SerializeToStream<T>(obj, stream);
+        }
+
+        public static T DeserializeFromStream<T>(Stream stream)
+        {
+            return ServiceStack.Text.TypeSerializer.DeserializeFromStream<T>(stream);
+        }
+    }
+}