Add Verge/Vox sites

Vox Media/The Verge is probably one of the biggest media companies to currently use Middleman:

[The Evolution of Tech News Teams](https://source.opennews.org/en-US/learning/evolution-news-apps-teams/)

[Middleman is sweet. The initial @voxdotcom site and now our features use @middlemanapp](https://twitter.com/yurivictor/status/459370603964035073)