Edited the krylov-based regression code for numerical stability
Edited the krylov-based regression code for numerical stability

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