Imatlab

====

- When an error occurs, don't display the outermost error from `eval`.
- Clarify message when errors come from plotly.
- Drop support for Jupyter 5.0 (requires workarounds); fix support for IPython
6.2, ipykernel 4.7.
- Figure exporter sorts figures by number and uses the screen resolution.

====

- Notebooks are saved as MATLAB files with ``%%``-separated cells.
- Run the ``imatlab_export_fig`` hook after each notebook cell. Support
``plotly``-based inline graphics.
- If both ``IMATLAB_CONNECT`` and ``IMATLAB_CD`` are set, forcefully change
MATLAB's working directory to match the kernel's.
- Miscellaneous improvements and bugfixes for the command history, the code
completeness checker, and engine shutdown.

====

- First public release.