Adding Cloak and GroupNode classes.
Added composer.json.
Corrected composer.json.
Corrected composer.json.
Corrected composer.json.
Corrected composer.json.
Corrected composer.json.
Corrected composer.json.
Corrected composer.json.
Added use statements for stdClass.
Convert code style to follow PSR-2 standards.
Adding a group content cloacking device to handle serialization of og_groups.