zilutian/data-caching repository overview

Please refer to the description on https://github.com/parsa-epfl/cloudsuite/blob/master/docs/benchmarks/data-caching.md⁠ and change the name of the docker images accordingly. Please note that the unscaled dataset size is 4.3M on disk. Scale factor of 20x will result in 756M file on disk, and consumes around 2.3 G memory.