------------------
- Extend JS by ``color_on_array_add`` and ``register_array_subscribers``
functions to enable usage in ``yafowil.widget.array``.
[lenadax]
- Add feature: locked swatches
[lenadax]
- Include forked version of iro.js (https://github.com/lenadax/iro.js)
[lenadax]
- Utilize iro.js
[lenadax]
- Initial.
[rnix]