Sebastien Grainger and the Mountains, S/T (Saddle Creek Records, 2008) MP3: “I Hate My Friends” If somebody slipped us this new Sebastien Grainger and the Mountains album with a homemade cover on it saying “New Killers Album Inside!,” we’d probably totally believe it upon first listen to lead track “Love Can Be So Mean.” It’s all there: the synthy undertones, the double-time on the hi-hat drumming, the BIG TIME guitar riffs, the overwrought, dramatic singing. All that’s missing are some lines