Transfer modal

This adds a basic skeleton for the transfer modal we'll need on the call
view page. For now, the demo lives on the landing page since there's
nothing else important there.

Everything is a placeholder - the radio button selectors and buttons
don't do anything.

![screen shot 2014-02-12 at 1 35 34 pm](https://f.cloud.github.com/assets/644004/2153895/be3b9240-942d-11e3-8f22-ec866f2d408b.png)