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Added multi-part sentiment:
- The sentiment end-point use to return object {"value": 0.54}.
- Now it returns object {"detail_list": [{"index": 0,"len": 20,"value": 0.54}],"value": 0.54}.
- See class 'feersum_nlu.models.sentiment.Sentiment'
Added the vaporise endpoint to permanently delete a model instance whether it is trashed or not.
Added a lang_code hint to the retrieve/inference and data endpoints.