Add an example board that is tied to a Fogbugz URL Trigger

Starting with the postFogbugz.py sample, I added a new sample folder implementing push technology for a live, event-driven sync with a Fogbugz account.

/example_realtime/liveFogbugz.py implements a long-pull method used in web-based stock tickers to show live prices.  It supports multiple simultaneous clients, but if you plan to have a few hundred or more, you'll need a modern web server designed to handle idle web sockets.

/example_realtime/refreshFogbugz.py is what triggers a push of new data to all browsers with the Solari Board open.

/example_realtime/index.html contains instructions for setting up the URL trigger in a company’s Fogbugz account.

Also, this example shows how URL and REFRESH_TIME can be customized from index.html without needing to modify solari.js