Add support for new social icons in FontAwesome 4.1.0

* Behance
* Codepen
* Delicious
* DeviantArt
* Digg
* jsFiddle
* qq
* Reddit
* SoundCloud
* Spotify
* Steam
* StumbleUpon
* Tencent Weibo
* Vine
* WeiXin
* WordPress
* Yahoo

Refs #136