upgrading travis to use scala 2.10.4 instead of 2.10.3
upgrading travis to use scala 2.10.4 instead of 2.10.3

twitter/summingbird,rangadi/summingbird,atomicjets/summingbird,nvoron23/summingbird,joychugh/summingbird,zirpins/summingbird,atomicjets/summingbird,zirpins/summingbird,nvoron23/summingbird,nkhuyu/summingbird,rangadi/summingbird,joychugh/summingbird,twitter/summingbird,nkhuyu/summingbird