oxfordhands setup warning

[Thanh Nguyen]

Hi, thank you for sharing.

I run into this problem when executing the oxfordhands_setup.py:
`

equal directory sizes, everything ok!
Buffy_225.jpg already exists
renaming to xBuffy_225.jpg!
Traceback (most recent call last):
File "oxfordhand_dataset_setup.py", line 112, in
main()
File "oxfordhand_dataset_setup.py", line 107, in main
cleanup_structure(data_path, dataset_path, tarfile_path)
File "oxfordhand_dataset_setup.py", line 86, in cleanup_structure
sh.copyfile(src_dir+file, drc_dir+newfile)
TypeError: must be str, not NoneType
`

Do you have any suggestion to resolve this problem?