Rename existing notebook and create generic notebook

[ruebot]

When squashing and merging commit message should read:

Title:

Rename existing notebook and create generic notebook #11 

Body:

- Rename notebook files
  - Create example notebook with existing data
  - Create notebook with empty collection id, and help text
- Update language in README and notebooks
- Tweak Dockerfile

[ruebot]

Once this is merged, we should update the repo description to be consistent with: "Jupyter notebooks to assist in creating additional analysis and visualizations of Archives Unleashed Cloud derivatives."

[greebie]

lgtm.