Document import capacities

Hi there,
Not sure if missed the feature, but it could be great to add an import feature when creating a new document in complement to the on-line editor.

Source could be either online (website, github repo, …) or local file (github markdown or html).

I’ve seen Easy import of markdown docs to wiki - #9 by Chr1sG, but mostly refere to copy/paste capacities (which is quite close but not exactly the same :slight_smile:).