Embed jupyter widgets in the webinterface

[andrewphilipsmith]

Demonstrate that jupyter widgets can be embedded in the web interface.

[andrewphilipsmith]

I have attempted to follow the example (web3) given in the ipywidgets documentation - without sucess.

I have asked questions here:

• https://discourse.jupyter.org/t/unable-to-get-ipywidget-web3-example-working/16601
• https://github.com/jupyter-widgets/ipywidgets/issues/3630

[andrewphilipsmith]

Now using Plotly, so this is no longer relevant.