batch_learner: For the function generate_save_neurons, added output_group to specify the location in new_file.
batch_learner: For the function generate_save_neurons, added output_group to specify the location in new_file.

nanshe-org/nanshe,DudLab/nanshe,jakirkham/nanshe,DudLab/nanshe,jakirkham/nanshe,nanshe-org/nanshe