Added 'attributes' method which return an array with all the attribute names of the object.
Added 'attributes' method which return an array with all the attribute names of the object.

ActiveRDF/ActiveRDF,ActiveRDF/ActiveRDF,mauriciobomfim/ActiveRDF,net7/ActiveRDF,net7/ActiveRDF,mauriciobomfim/ActiveRDF,ActiveRDF/ActiveRDF,net7/ActiveRDF,mauriciobomfim/ActiveRDF,net7/ActiveRDF