First implementation with Lightning

bob/learn/pytorch/architectures/ResNet.py

bob/learn/pytorch/architectures/iresnet.py

bob/learn/pytorch/architectures/lenet.py

bob/learn/pytorch/datasets/tfrecord/__init__.py

bob/learn/pytorch/datasets/tfrecord/example_pb2.py

bob/learn/pytorch/datasets/tfrecord/tfrecord.py

bob/learn/pytorch/head/__init__.py

bob/learn/pytorch/head/arcface.py

bob/learn/pytorch/scripts/lightning.py

bob/learn/pytorch/test/test_lightning.py

bob/learn/pytorch/trainers/__init__.py

bob/learn/pytorch/trainers/lightning.py

setup.py