Add updated Jupyter Notebooks

[arnikz]

• [x] update/extend grlc API
• [x] replace the SPARQL queries (wrapper) with the Web API where possible
• [x] improve (meta)data in the tables
• [x] improve data visualization and/or interactivity
• [x] improve in-line documentation

See the source codes are here.

[arnikz]

@matthijsbrouwer: /getFeaturesInInterval query is fixed so you can use it in the notebook.