Changes include:
- The WikilinkNN model has been added allowing users to derive recommendations based which articles are linked to the same other Wikipedia articles
- Examples have been updated to reflect this new model
- books_embedding_model.h5 is provided for quick experimentation
- enwiki_books.ndjson has been updated with a more recent dump
- Function docstring grammar fixes
- Baseline testing for the new model has been added to the CI