Refactor call view HTML/CSS

This encompasses significant visual changes, as well as code changes.
HTML is standardized to use 2 spaces for indentation, and CSS class
names with hyphens.

![screen shot 2014-02-18 at 12 36 08 pm](https://f.cloud.github.com/assets/644004/2200048/6139761c-98dc-11e3-9dd3-02e4d7131c35.png)