XML serialization/deserialization support

[tonivade]

Possible providers:

• Jaxb, please NO!
• Xstream, it seems old and discontinued
• XMLEncoder/XMLDecoder, It works?
• org.json.XML, too simple?

[tonivade]

Xstream, too many extra dependency. Ugly result.

[tonivade]

XML, doesn't work.

When I try to serialize a {} the result is "", so I have to specify a root tag.
But when I try to deserialize the result is: {"body": null}

[tonivade]

Implemented using Jaxb 😢

Thank $DEITY to his awesome features like:

• Doesn't support classes with no empty default constructor. It does using a XmlAdapter 👎
• Doesn't support classes without setter/getter. It does using @XmlAccessorType(FIELD), but fields should not be private or final. 👎
• Needs to use awful annotations to work, like @XmlRootElement
• Exceptions everywhere.

Wonderful design, no doubt.