Improve search results responsiveness

:fork_and_knife: Follow button no longer wraps on mobile displays. Make sort buttons 100% width on smaller displays.

![screen shot 2014-06-18 at 11 45 23 am](https://cloud.githubusercontent.com/assets/316507/3316148/c9361a6e-f6ff-11e3-9a18-9fb252d1d9e6.png)