Cannot run without CUDA

[Connor-Bowley]

It would be good to be able to run without CUDA. I got the following error:

CLI execution failed: 
 
CrownSegmentationcli standard error:

Traceback (most recent call last):
  File "/data/Projects-build/salt-general/SlicerJawSegmentation-build/lib/SlicerSALT-5.1/cli-modules/CrownSegmentationcli.py", line 297, in <module>
    main(sys.argv[1], sys.argv[2], int(sys.argv[3]), int(sys.argv[4]), sys.argv[5],sys.argv[6], sys.argv[7], sys.argv[8])
  File "/data/Projects-build/salt-general/SlicerJawSegmentation-build/lib/SlicerSALT-5.1/cli-modules/CrownSegmentationcli.py", line 145, in main
    model.load_state_dict(torch.load(unet_model))
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 712, in load
    return _load(opened_zipfile, map_location, pickle_module, **pickle_load_args)
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 1046, in _load
    result = unpickler.load()
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 1016, in persistent_load
    load_tensor(dtype, nbytes, key, _maybe_decode_ascii(location))
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 1001, in load_tensor
    wrap_storage=restore_location(storage, location),
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 176, in default_restore_location
    result = fn(storage, location)
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 152, in _cuda_deserialize
    device = validate_cuda_device(location)
  File "/home/connor/Projects-build/salt-general/build-5-2/python-install/lib/python3.9/site-packages/torch/serialization.py", line 136, in validate_cuda_device
    raise RuntimeError('Attempting to deserialize object on a CUDA '
RuntimeError: Attempting to deserialize object on a CUDA device but torch.cuda.is_available() is False. If you are running on a CPU-only machine, please use torch.load with map_location=torch.device('cpu') to map your storages to the CPU.

[juanprietob]

Working on it.
The pull request #22 should address this issue.
@HUTIN1 please help test if it works without CUDA now?