Robotic underlings for various chores on PPSDB

To install dependencies:

• Create and activate a Python virtual environment
• Install dependencies with pip install -r requirements.txt

Usage of scripts is documented with --help argument.

Sequence of running the scripts:

• get_dois_not_in_refs.py -- Run this first, create reference items in Wikidata with Scholia or SourceMD if necessary
• create_refs_from_doi.py -- Create ref items in PPSDB that are linked to Wikidata items
• get_formatted_citations_from_doi.py -- Add formatted citations to reference items in PPSDB
• link_ref_statements_to_items.py -- Link reference statements to reference items based on their DOIs