-Added IgnoreSerializableInterface to DefaultContractResolver

-Changed serializing ISerializable types under partial trust to error to fix security issue
-Fixed LinqBridge collision error in .NET 2.0 by moving types to a different namespace
-Fixed JObject.Keys error when object has no items

Src/Newtonsoft.Json.Tests/TestObjects/SerializationEventTestObject.cs

@@ -25,9 +25,7 @@
 
 #if !PocketPC
 using System;
-using System.Linq;
 using System.Runtime.Serialization;
-using System.Text;
 using Newtonsoft.Json.Serialization;
 
 namespace Newtonsoft.Json.Tests.TestObjects