By Denny Dyroff, Staff Writer, The Times Toronzo Cannon Some artists pursue a career in music because it’s in their DNA. For others, the path to making music can be traced to environmental sources. Toronzo Cannon, who will perform on July 24 at the World Café Live (3025 Walnut Street, Philadelphia, 215-222-1400, www.worldcafelive.com), is an American electric blues guitarist, vocalist and songwriter. His...