Hande export/import of nested json_object * pointers

[jamie-pate]

Handle export/import of nested json_object * pointers automatically. EG: jstruct_result currently contains a @private json_object *inner_result property which is appended to the exported json object manually. Unless a json_object * is marked with @private it should automatically be added into the export and should automatically get a reference to place in the .allocated arraylist of the jstruct_result and the imported struct.