Add hashes to cnn_dailymail
MEMBER
Looks you to me :)

Could you also update the json file that goes with the dataset script by doing 
```
nlp-cli test ./datasets/cnn_dailymail --save_infos --all_configs
```
It will update the features metadata and the size of the dataset with your changes.
2020-07-10T10:16:20Z
https://github.com/huggingface/datasets/pull/357#issuecomment-656600450
https://api.github.com/repos/huggingface/datasets/issues/357
MDEyOklzc3VlQ29tbWVudDY1NjYwMDQ1MA==
https://api.github.com/repos/huggingface/datasets/issues/comments/656600450/reactions
2020-07-10T10:16:20Z
https://api.github.com/repos/huggingface/datasets/issues/comments/656600450
https://avatars.githubusercontent.com/u/42851186?v=4
https://api.github.com/users/lhoestq/events{/privacy}
https://api.github.com/users/lhoestq/followers
https://api.github.com/users/lhoestq/following{/other_user}
https://api.github.com/users/lhoestq/gists{/gist_id}
https://github.com/lhoestq
lhoestq
MDQ6VXNlcjQyODUxMTg2
https://api.github.com/users/lhoestq/orgs
https://api.github.com/users/lhoestq/received_events
https://api.github.com/users/lhoestq/repos
https://api.github.com/users/lhoestq/starred{/owner}{/repo}
https://api.github.com/users/lhoestq/subscriptions
User
https://api.github.com/users/lhoestq
public
CONTRIBUTOR
@lhoestq I ran that command.

Thanks for the helpful repository!
2020-07-11T22:38:55Z
https://github.com/huggingface/datasets/pull/357#issuecomment-657141058
https://api.github.com/repos/huggingface/datasets/issues/357
MDEyOklzc3VlQ29tbWVudDY1NzE0MTA1OA==
https://api.github.com/repos/huggingface/datasets/issues/comments/657141058/reactions
2020-07-11T22:38:55Z
https://api.github.com/repos/huggingface/datasets/issues/comments/657141058
https://avatars.githubusercontent.com/u/2238344?v=4
https://api.github.com/users/jbragg/events{/privacy}
https://api.github.com/users/jbragg/followers
https://api.github.com/users/jbragg/following{/other_user}
https://api.github.com/users/jbragg/gists{/gist_id}
https://github.com/jbragg
jbragg
MDQ6VXNlcjIyMzgzNDQ=
https://api.github.com/users/jbragg/orgs
https://api.github.com/users/jbragg/received_events
https://api.github.com/users/jbragg/repos
https://api.github.com/users/jbragg/starred{/owner}{/repo}
https://api.github.com/users/jbragg/subscriptions
User
https://api.github.com/users/jbragg
public
The URL hashes are helpful for comparing results from other sources.