upgrading summingbird version 0.5.2rc3, scalding version 0.12.0rc1
upgrading summingbird version 0.5.2rc3, scalding version 0.12.0rc1

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