If you’re old enough, you’ll remember the Monkees, the adorable pop group with a wacky TV show in the 1960s. Michael Nesmith was the Monkee in the green stocking cap. Since then, he’s reinvented his career several times over. He (sort of) invented country rock. And the music video. And he wrote two novels and worked in film and virtual reality. He talks with Doug Gordon about his memoir “Infinite Tuesday.”