Cleaned up and commented trainer.
Cleaned up and commented trainer.

LARG/HFO,mhauskn/HFO,sanmit/HFO-benchmark,cowhi/HFO,cowhi/HFO,UNiQ10/HFO,mhauskn/HFO,UNiQ10/HFO,LARG/HFO,cowhi/HFO,mhauskn/HFO,sanmit/HFO-benchmark,LARG/HFO,UNiQ10/HFO,sanmit/HFO-benchmark