added Attribute.setDirty / evaluate
added Attribute.setDirty / evaluate

juggernate/pymel,leonsooi/pymel,assumptionsoup/pymel,shrtcww/pymel,shrtcww/pymel,AtonLerin/pymel,AtonLerin/pymel,assumptionsoup/pymel,david-lassonde-adsk/pymel,juggernate/pymel,leonsooi/pymel,david-lassonde-adsk/pymel