Expose option to encode when Marshalling a Class

This release (3 years on!):

• Adds the option to choose whether to marshall the class instance or not (#1)
• Updates the readme and adds proper license information into composer.json (#4)
• Updates the readme again for clarity on namespaces (#6)

Initial release of PHP JSON Marshaller

Initial release of PHP JSON Marshaller

• Marshalling and Unmarshalling of JSON strings into named PHP Objects
• Inline Documentation
• Test Coverage for Project