0.1.3

What's changed:

• Created Apps Script to process Google docs, PDF, and Gmail threads. See
  apps_script/README.md.
• Added third_party/g2docsmd-html which is the base for converting files to
  markdown.
• Updated the main README.md for clarity.
• Created a scripts/README.md to better explain content processing.

Full Changelog: https://github.com/nickvander/generative-ai-docs/commits/0.1.3