By Kevin Gray Texas’s reputation for barbecue extends far beyond the state’s borders, as visitors make the pilgrimage from all over the country (and the world) to sample brisket, beef ribs and other smoked meats. Visiting as many barbecue joints as possible makes an excellent to-do list for locals and out-of-staters alike, but with a little instruction, you may be able to supplement those visits with some top-notch DIY barbecue of your own, perfected at various schools and classes offered around the state. Barbecue classes range from in-person affairs to online options that let you learn at yo…