cleaned up lars_main and added command line options
cleaned up lars_main and added command line options

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