Comedy Central has picked up a second season of “Important Things With Demetri Martin,” ordering 10 episodes.Produced by Jon Stewart’s Busboy Prods. shingle, the sketch comedy skein has scored for the cabler in its core demo of young men. Series bowed in February to 2.8 million viewers and averaged 2.3 million viewers through its run. The second season of “Important Things” is set to preem early next year. Martin can be seen next in Ang Lee’s “Taking Woodstock” with Emile Hirsch.