Revert "Revert "Switch to an inline list for the social buttons.""

Proof that this patch couldn't have caused any issues.

dev.bootstrapcdn.com:
![dev bootstrapcdn com](https://cloud.githubusercontent.com/assets/349621/5312605/b105ac8e-7c65-11e4-819d-53d6c2dadfb7.png)

this patch:
![social-branch](https://cloud.githubusercontent.com/assets/349621/5312606/b548bc00-7c65-11e4-8013-1c2a8e648359.png)