Moclo

Fixed
- Support all ``fs`` versions under `3.0`.

Changed
- Add ``2.3.0`` to the supported ``fs`` versions.

Changed
- Add ``2.2.0`` to the supported ``fs`` versions.

Added
- Add ``Item.record`` shortcut to ``Item.entity.record`` in ``moclo.registry``.
- Make ``moclo.core`` abstract classes check for illegal sites in sequence to
be identified as *valid*.
- This *CHANGELOG* file.

Fixed

* Fix some registries not loading records into `CircularRecord` instances, causing assembly to fail.

Changed

* Update YTK notebook to use tag exclusion for `eLabFTW`
* Bump required `fs` version to `2.1.0`
* Add some of the Formal Language theory to the documentation

Documentation

* Fix links and add more resources to the main README file.
* Fix inheritance hints for toolkit classes.
* Add CIDAR kit SVG images.

Added

* Add `AbstractPart.characterize` to load a record into a part instance
* Add option to use tags to include / exclude items from the `ELabFTWRegistry`