Add DualTreeKMeans as an option to the kmeans program (and also DTNN with cover trees).
Add DualTreeKMeans as an option to the kmeans program (and also DTNN with cover
trees).


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