♻️ REFACTOR: package API/CLI/documentation ([74](https://github.com/executablebooks/jupyter-cache/pull/74))
This release includes major re-writes to key parts of the package,
to improve the user interface, and add additional functionality for reading and executing notebooks.
Key changes:
1. `stage`/`staging` is now rephrased to `notebook`, plus the addition of `project`, i.e. you add notebooks to a project, then execute them.
2. notebook `read_data` is specified per notebook in the project, allowing for multiple types of file to be read/executed via the CLI (e.g. text-based notebooks via <https://jupytext.readthedocs.io>).
Before, the read functions were passed directly to the API methods.
3. The executor can be specified with `jbcache execute --executor`, and a parallel notebook executor has been added.
4. Improved execution status indicator in `jbcache project list` and other CLI improvements.
5. Re-write of documentation, including better front page, with quick start guide and better logo.
Dependencies have also been restructured, such that the CLI dependencies (`click`, `tabulate`) are now required,
whereas `nbdime` is now optional (since it is only used for optional notebook diffing).
‼️ Breaking:
The name of the SQL table `nbstage` has been changed to `nbproject`, and `read_data`/`exec_data` fields have been added to the `nbproject`.
This means that reading will fail for caches creted using older versions of the package.
However, the version of `jupyter-cache`, used to create the cache, is now recorded, allowing for the possibility of future automated migrations.