At least 13 people have been shot in Chicago at the start of the long holiday weekend, including a woman killed as she sat on a porch near Garfield Park and a man slain in front of a hair salon on the South Side, police said. ... The mother of the boy, Andrea Byes, said she is planning to move out of the two-flat where she lives with her children because of the violence, drug sales and loitering on the block. "I'm not surprised something like this happened," said Byes, 40. "It was a matter of time. They're all over...