Add newcomer's session notes; update README
Add mostly done notes on Commencement and ABIE awards; pictures

The section of notes on the keynote speaker (Shafi Goldwasser) still
needs to be fixed up.

When cleaning up my notes, I take several steps:
 - Convert shorthand into full sentences
 - Fix typos
 - Add context and clarification
 - Add images
 - Add links and attributions
 - Add markdown formatting (headers, blockquotes, bold, etc.)

This process is continuing for the document added here and other
documents.