Implement a Kryo serializer and deserializer

[axkr]

Kryo is a fast and efficient binary object graph serialization framework for Java.

• https://github.com/EsotericSoftware/kryo

Currently there is a simple (incomplete) "standard" Java serializer/deserializer and the BinarySerialize and BinaryDeserialize for the WXF format.

Kryo serialization should be used in the future to serialize/deserialize complete Contexts in a platform dependent way to save and load for example a Context``Global session in a web server environment.