Add social network XING

[deki]

Could you please add XING to the social networks? It's more famous than LinkedIn in german speaking countries.

[puikinsh]

This theme uses http://genericons.com/ and currently XING icon is not on their library. To make it work I have to switch to another library such as FontAwesome or other.

Will think about switching to FontAwesome as it would offer much more icons and flexibility. But don't expect it to be available right away as this is not on top of my list for this theme.

[FreeWPTP]

Related Issue : https://github.com/Automattic/Genericons/issues/31