Reset `tutorial.ipynb` to previous commit.
Reset `tutorial.ipynb` to previous commit.

derekjchow/models,alexgorban/models,cshallue/models,derekjchow/models,tombstone/models,alexgorban/models,tombstone/models,alexgorban/models,derekjchow/models,cshallue/models,derekjchow/models,tombstone/models,tombstone/models,tombstone/models,cshallue/models,tombstone/models,derekjchow/models,alexgorban/models,cshallue/models,alexgorban/models,cshallue/models