By Tim Hepher and Yiming Woo PARIS (Reuters) -A French criminal court opened the historic manslaughter trial of Air France and planemaker Airbus on Monday, with relatives demanding justice more than 13 years after an A330 passenger jet ploughed into the Atlantic, killing everyone on board. The heads of both companies pleaded not guilty to involuntary corporate manslaughter after officials read out the names of all 228 who died when AF447 vanished during a night-time equatorial storm en route from Rio de Janeiro to Paris on June 1, 2009. Families of several victims shouted protests including “s…