Picture perfect cowboy BY JOE GULICK AVALANCHE-JOURNAL A photograph taken of a Lubbock cowboy and his horse in front of a spectacular West Texas sunset has gained fame both inside and outside the Lubbock city limits and was honored in Austin last week by both houses of the Texas Legislature. Employees of Visit Lubbock, the city's convention and visitors bureau, titled the photograph "The Legend Lives On" and used it as the cover of its current Lubbock Visitor Guide. The picture also has been used in several advertisements for Lubbock, including ones in People Magazine, Texas Monthly and Continental Airlines....