Implemented proof of concept of SerializabelJson and SerializableObjectModel

* Serializable methods has been implemented by SerializableJson
* SerializableJson implements Serializable interface
* SerializableObjectModel implements Serializable interface
* Serializable interface defined to use both or any future serialization method
* Serializable spects to add nodes to a given Node, if is Document a root
if an Element childs Nodes.
* Serializable can be used to serialize objects implementing it