add tooltips, authorbio, some style tweaks

[mathisonian]

@OmarShehata merge this whenever you can. some small updates, submitting as a PR in case I conflict with anything you were working on.

• Adds a createImageBitmap polyfill
• Some minor stylistic tweaks
• Adds missing font files
• Updates footer

Make sure you run npm install after pulling to get the latest shared components & styles