Realtor.com operator Move and REA Group — which operates listing portals in 11 countries — have launched what their parent company, News Corp., says is the “world’s largest source of global property listings.” The network, hailed by Move CEO Ryan O’Hara as an “important step forward in the evolution of real estate,” offers users of the participating property search sites access to 3 million listings in 56 countries, according to News Corp …