Style check refactoring.

.pylintrc

combo/commands/__init__.py

combo/commands/train.py

combo/data/api.py

combo/data/dataset.py

combo/data/samplers/samplers.py

combo/data/token_indexers/token_features_indexer.py

combo/main.py

combo/models/base.py

combo/models/embeddings.py

combo/models/encoder.py

combo/models/lemma.py

combo/models/model.py

combo/models/morpho.py

combo/models/parser.py

combo/models/utils.py

combo/predict.py

combo/training/checkpointer.py

combo/training/tensorboard_writer.py

combo/training/trainer.py