More artists have been added to the Heavy Montreal festival, including Cattle Decapitation, Neurosis, Abbath, the Devin Townsend Project, Sanctuary, Veil of Maya, the Acacia Strain and Extreme, The festival will take place at Parc Jean-Drapeau, in Montreal, QC from August 7-9 and will also include: Slipknot, Faith No More, Korn, Alexisonfire, Lamb Of God, Iggy Pop,…