sending back Hangouts URL

When the Google Hangout app loads, the URL is now sent back to the web2py
instance with an AJAX call.
HTML & JS cleanup

Removed testing JS methods and HTML sample code that was not being used.
namespacing group chat JS

JavaScript code now have of "lms299.groupchat". jQuery's onRead() function
is now leveraged to add the our JS to Google Hangout's onClientReady()
callback. Before, Google's client.js library was being used.