Alignn

- Fix atomwise_output_features as in issue https://github.com/usnistgov/alignn/issues/98

- Supercon models added
- Fix train outputs
- version update

Adding package_data in setup.py for allowing ALIGNN-FF

Added __init__.py ff , else cannot import ALIGNN-FF.

Added supercon model, added FF dataset for elements from Mlearn, early_stopping fix version update.

- Fix pytorch version to match torchvision, which is necessary for atomvision
- https://github.com/pytorch/vision/blob/cb60e97a778ad6626980b67c456984e5fcf1d507/README.rst#L22