3.1.0 Added support for default(T) results

Fix for issue #4
YamlConvert.DeserializeObject() => default(T) instead of throwing exception when token is null

3.0.0 published

• Updated YamlDotNet to version 16.0 and Json.Net to 13.0
• verified that null is correctly emitted or not emitted according to json.net attributes.
• added to JsonConvert.SerializeObject() and JsonConvert.DeserializeObject() the ability to pass in JsonSerializerSettings to control the conversion of JObject dynamic objects to YAML and back.