Instructions:
- `wget http://www.cs.columbia.edu/CAVE/databases/SLAM_coil-20_coil-100/coil-100/coil-100.zip`
- `unzip coil-100.zip`
- `mv coil-100/* .`
- `rmdir coil-100`

References:
- https://www.tensorflow.org/datasets/catalog/coil100
- https://www.cs.columbia.edu/CAVE/software/softlib/coil-100.php
