Implement Rescore(). Minor speedup.
Implement Rescore(). Minor speedup.

trungda/mlpack,thirdwing/mlpack,ersanliqiao/mlpack,BookChan/mlpack,minhpqn/mlpack,bmswgnp/mlpack,theranger/mlpack,stereomatchingkiss/mlpack,trungda/mlpack,ranjan1990/mlpack,ersanliqiao/mlpack,bmswgnp/mlpack,lezorich/mlpack,BookChan/mlpack,lezorich/mlpack,datachand/mlpack,datachand/mlpack,chenmoshushi/mlpack,thirdwing/mlpack,ranjan1990/mlpack,ersanliqiao/mlpack,palashahuja/mlpack,theranger/mlpack,stereomatchingkiss/mlpack,Azizou/mlpack,minhpqn/mlpack,minhpqn/mlpack,Azizou/mlpack,erubboli/mlpack,darcyliu/mlpack,ranjan1990/mlpack,bmswgnp/mlpack,lezorich/mlpack,erubboli/mlpack,theranger/mlpack,darcyliu/mlpack,datachand/mlpack,erubboli/mlpack,BookChan/mlpack,palashahuja/mlpack,chenmoshushi/mlpack,ajjl/mlpack,ajjl/mlpack,Azizou/mlpack,ajjl/mlpack,trungda/mlpack,thirdwing/mlpack,darcyliu/mlpack,chenmoshushi/mlpack,stereomatchingkiss/mlpack,palashahuja/mlpack