Today, they don't seem like outlaws: Willie Nelson, Waylon Jennings, Kris Kristofferson, Johnny Cash, Merle Haggard, Hank Williams, Jr., David Allan Coe, Tompall Glaser, Johnny Paycheck and numerous others are simply considered country legends. But outlaw country, as their brand of music came to be known, was once a rebellious and controversial thing. Rejecting the Nashville sound of the day, outlaw musicians combined Western swing, hillbilly music, and rock 'n roll to create some of the…