As far as country music goes, Sherwin Linton of Coon Rapids is the real deal. You can hear it in his deep South Dakota drawl and see it in his cowboy boots and fringed suede jacket. Linton, 64, can't remember a day when he wasn't in love with country, or western music as it was called back in his youth. He's performed from coast to coast, appeared on TV, written radio hits and done the Nashville/Grand Ole Opry circuit. Linton was country before country was cool, as the slogan goes. Linton brings his country caravan to the Midwest Country Theater in Sandstone, Minnesota, this Sunday night, in support of his new CD, It Happened in America. On Monday night, he plays at the Fine Line Music cafe in Minneapolis.