Friday, April 30th Schedule...by Flyer Staff...Neon Trees Cellular South Stage • 6 p.m. Utah-based rock band Neon Trees play a catchy brand of modern rock similar to fellow westerners the Killers. Neon Trees' major-label debut album, Habits, was released in March. MuteMath Cellular South Stage • 7:35 p.m. An eclectic New Orleans-based rock band with roots in the Christian music scene, MuteMath have built a strong following. The band's most recent album, Armistice, saw them moving in a more experimental direction, incorporating electronic elements, strings,…