added nuiRefAttribute and nuiMakeRefAttribute for simple attribute creation
added nuiRefAttribute and nuiMakeRefAttribute for simple attribute creation

libnui/nui3,UIKit0/nui3,libnui/nui3,libnui/nui3,UIKit0/nui3,UIKit0/nui3,UIKit0/nui3,UIKit0/nui3,libnui/nui3,UIKit0/nui3,libnui/nui3,libnui/nui3,UIKit0/nui3