ST. LOUIS, Dec. 7, 2011 /PRNewswire/ — Peabody Energy (NYSE:   BTU) today announced that it has acquired a 5.1 percent equity interest in Winsway Coking Coal Holdings Ltd. in a series of purchases of Winsway’s shares on the Hong Kong Stock Exchange.  The move further strengthens the strategic partnership between the two companies. Peabody and...