update contact page

input/contact.md

 compat: kontakt
 ---
 
-You can always use this [PGP Key][1]!
+You can always use this [PGP Key](files/xythobuz.gpg)!
 
-Mail: <xythobuz@xythobuz.de>
-
-Jabber: xythobuz@jabber.org
-
-Twitter: [@xythobuz][2]
-
-Facebook: [Ver Ballert][3]
-
-Youtube: [xythobuz][4]
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-Vimeo: [xythobuz][5]
-
- [1]: files/xythobuz.gpg
- [2]: https://twitter.com/xythobuz
- [3]: https://www.facebook.com/vballert
- [4]: http://www.youtube.com/user/xythobuz
- [5]: https://vimeo.com/xythobuz
+* Mail: <xythobuz@xythobuz.de>
+* Twitter: [@xythobuz](https://twitter.com/xythobuz)
+* Youtube: [xythobuz](http://www.youtube.com/user/xythobuz)