Live Value Updating

This pull request adds:
  - Live value updating thanks to https://gist.github.com/Codingbean/8187381 and https://www.cryptsy.com/pages/api

The API wrapper is hosted on http://codingbean.com/cat/cat.php, due to cross-domain issues and lack of support for PHP in Github Pages. We can move the PHP file to a server you own if you'd feel it would be safer there.