Adding Enriched WebNLG dataset
Nice :) 

could you add the tags and also remove all the dummy data files that are not zipped ? The diff currently shows 800 files changes xD Aaaaand it's rebase time - the new one is at #1264 ! closing this one since a new PR was created
This pull requests adds the `en` and `de` versions of the [Enriched WebNLG](https://github.com/ThiagoCF05/webnlg) dataset