implementation of Pegasos in opt_sgd.h
implementation of Pegasos in opt_sgd.h

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