Update copyright file to include new contributors.
Update copyright file to include new contributors.


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