[Suggestion] Few new features I could prepare PRs for if wanted

Hi there,

I added the following features on my fork - if any are of interest, I'd be happy to polish them up (ie settings into config rather than hard coded, etc) and send pull requests:

• BTC price in USD/GBP (using coindesk);
• foreign currency exchange rates (using yahoo finance);
• custom text scrolling component for news headlines, I found the built-in marquee too slow.

Thanks for all your code so far! Tim