Metallica frontman James Hetfield has paid tribute to Megaforce Records co-founder Marsha Zazula, who has died at the age of 68.With Zazula and her husband Jon at its helm, Megaforce became the first label to release Metallica’s earliest works – including their 1983 debut ‘Kill ‘Em All’ and its follow up ‘Ride the Lightning’.The label also housed heavy metal acts such as Anthrax, Testament King’s X, Overkill, Bad Brains and Meat Puppets.As Blabbermouth reports, Hetfield has hailed Zazula for