Запрос на слияние 'Test' (#1) из Test в master

update spec/codex.md

update spec/codex.md

update spec/codex.md

update README.md

update spec/codex.md

update spec/codex.md

update spec/codex.md

update README.md

update README.md

upload files

update demo/demo.csv

delete demo/california_housing_test.csv

delete demo/demo.csv

delete demo/california_housing_train.csv

delete demo/anscombe.json

delete demo/mnist_test.csv

upload files

create demo/demo.csv