nest divs for easier styling; center adorable icons

i'll leave line-by-line comments in my PR with explanations :) 
delete whitespace - you can install a plugin that will highlight it for you. it looks like this for me locally:

![screenshot 2014-12-23 12 04 05](https://cloud.githubusercontent.com/assets/3128783/5542472/89b1397a-8a9b-11e4-8648-b6acd635fd6e.png)