Create user.css

New theme for Kriss Feed which only consists in a merge between two exisiting themes: 
https://github.com/tontof/kriss_feed/tree/master/style/greader/user.css for the main base (no credit available in the *.css file...)
https://github.com/tontof/kriss_feed/tree/master/style/p3ter/user.css for the icon in the bar.