- [x] Add API call to GET the datasets + tags associated with a tagging event, something like: `API_URL_PREFIX + '/events/{uid}/datasets` - [x] Add API calls to GET tagging event according to it's UID and to QUERY tagging events according to tagger_id - [x] POST multiple datasets (120k images) with their corresponding labels. Currently posting 1 by 1 takes too long and there may be duplicated URIs - [x] Add unit tests for all these changes