-Updated main project to .NET 4.0
-Updated to psake 4.0
-Changed assembly version to 4.0.0.0
-Added ICustomTypeDescriptor implementation to JObject, removed JTypeDescriptionProvider and JTypeDescriptor
-Changed serialization of collections to use iterator rather than indexer
-Removed Compact Framework project
-Fixed XML documentation warnings
-Added WriteObjectId to BsonWriter
-Added BsonObjectId and BsonObjectIdConverter classes
-Added KeyValuePairConverter
-Added DynamicCodeGeneration flag to DefaultContractResolver
-Changed JsonConverter.ReadJson to add an extra parameter: currentValue
-Added StreamingContext to JsonSerializer
-Added CreateMemberValueProvider method to DefaultContractResolver
-Fixed not falling back the original class from the metadata class when attribute not found
-Added CustomCreationConverter
-Added IsReference to JsonContainerAttribute
-Added PreserveReferencesHandling to JsonSerializer
-Added IReferenceResolver to JsonSerializer
-Split internals of JsonSerializer into JsonSerializerWriter (serializes) and JsonSerializerReader (deserializes)
-Moved serialize stack from JsonWriter (yuck) to JsonSerializerWriter (yay)
-Added FromObject overload with JsonSerializer argument for cases when state is needed