Minor formatting changes to Wordnik IA

Fix for issue #1074 - just the desktop view for now.

Desktop view (highlighted margins):
![wordnik_margins](https://cloud.githubusercontent.com/assets/3652195/4264262/1b93552a-3c1e-11e4-8712-1d7d598a8d7c.png)

Desktop view (plain):
![screen shot 2014-09-01 at 16 35 44](https://cloud.githubusercontent.com/assets/3652195/4264265/28c0fdf6-3c1e-11e4-95ec-24e3690f9ed8.png)

//cc @chrismorast