Manage user corpora

If user authentication and private user corpora are enabled, these can be used to manage the user's own corpora: creating/deleting, adding data and sharing.

("global" corpora, that don't belong to a specific user, can not be managed through these endpoints at this time)

• Create corpus : POST /blacklab-server
  Create a new corpus.
• Delete corpus : DELETE /blacklab-server/<corpus-name>
  Delete the specified corpus.
• Add documents to corpus : POST /blacklab-server/<corpus-name>/docs
  Index the uploaded input files, adding documents to the corpus.
• Get corpus sharing settings : GET /blacklab-server/<corpus-name>/sharing
  Return the list of users with whom the corpus is shared, if any.
• Update corpus sharing settings : POST /blacklab-server/<corpus-name>/sharing
  Set or update the list of users to share the corpus with.
• Corpora shared with me : GET /blacklab-server/shared-with-me
  Return a list of corpora shared with the currently logged-in user.