Publish the Amateurfilm dataset to data.b&g and the NDE register

[Veldhoen]

See Publication datasets appendix for more details Tasks:

• [x] Add the dataset to the spreadsheet
• [x] Add a document describing the dataset to the datasets folder
• [x] Run script to publish the dataset to our catalog
• [ ] Run script to publish the dataset to the register

[wmelder]

The dataset is added to our catalog. This query can be run to show some of the properties.