benchmark v3

Update dataset_meta.yaml: en parity ference byte count

Update metrics in README

add bytes to metadata of each document

new version, max 200k words

Create README.md

v3.4 rename jp to ja

v3.3 reduce number of documents per source by combining

v3.2, add subtitles for all langs and social for pt

v3.1, emoji data en and zh

V3 dataset, 13 langs

Add pretty names to datasets

fix name of sources

dataset v1

initial commit