MNIST compatible data set

[norvig]

It would be good to incorporate this data set, which has the same format as MNIST, and so should be easy to work with: https://github.com/zalandoresearch/fashion-mnist/blob/master/README.md

[bakerwho]

This should probably be closed. aima-data already holds this dataset here.

[rishabhdash]

Can a dataset similar to MNIST be added for text. This will be helpful in supervised learning methods. This will be very much be useful in NLP techniques. Like for example some reviews and star ratings from a movie. Best would be something like Amazon review dataset as we can do a temporal analysis.