 Fix filename uniqueness in game_converter.py
 Fix filename uniqueness in game_converter.py

Rochester-NRT/AlphaGo,vftens/RocAlphaGo,Rochester-NRT/RocAlphaGo,hiropppe/RocAlphaGo,MaMiFreak/RocAlphaGo,Rochester-NRT/AlphaGo,Rochester-NRT/AlphaGo,wrongu/RocAlphaGo