Update HISTORY with MiniBatchSGD changes.
Update HISTORY with MiniBatchSGD changes.

ajjl/mlpack,palashahuja/mlpack,darcyliu/mlpack,darcyliu/mlpack,ranjan1990/mlpack,darcyliu/mlpack,ranjan1990/mlpack,ajjl/mlpack,ranjan1990/mlpack,ajjl/mlpack,palashahuja/mlpack,palashahuja/mlpack