Adding additional Social Networks to the Plugin

Hi, thanks for this great plugin!
Would it be possible to have additional Social Networks added to the current selection?
Or can it easily be done by tweaking the code?
I need to add Social Networks for specific target groups in Europe. e.g. XING for business.
They offer a javascript to implement a share button

<script type="XING/Share" data-counter="right" data-lang="en"></script><script src="https://www.xing-share.com/js/external/share.js" type="text/javascript"></script>

Thanks a lot
Robert