This directory holds (after you download them):
- cifar-10-python.tar.gz (download link)
 - demo (folder contains demo images)
 - extract (folder contains image files and labels, generated by gen_lmdb.py)
 - train_lmdb (db file, generated by gen_lmdb.py)
 - test_lmdb (db file, generated by gen_lmdb.py)