As a pretty heavy notebook user (for computer vision and machine learning), I have to say that all of these new features are nice but they don't address the rea

As a pretty heavy notebook user (for computer vision and machine learning), I have to say that all of these new features are nice but they don't address the real problems with the current ecosystem. Namely, there's no good way to transition exploratory notebook code to python modules. We need linting and refactoring tools in the notebook and something better than `aimport` for moving code into separate `.py` files.