Refactor GMMTest for boost::serialization.
Refactor GMMTest for boost::serialization.

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