Set up basic layout in html and css for login and chat with rudimentary js for login and chat

* One page app format that displays login box first.
* Entering user name (no checks) and clicking login updates page to display chat box, room list, and user list with user's own name at top of UI.
* Clicking Say button adds dummy text to chat window.
Merge pull request #2 from artfoundry/basic-UI

Set up basic layout in html and css for login and chat with rudimentary ...