Create README for "qbt-theme"

src/icons/qbt-theme/README.md

@@ -0,0 +1,7 @@
+qBittorrent Theme Icons
+------------------------------------------
+Initial `qbt-theme` icons created by Bert Verhelst (<verhelstbert@gmail.com>). 
+
+Icons are based on the `Font-Awesome` icon-set: [link](http://fontawesome.io/icons/). 
+
+If you need to add an icon that qBittorrent does not already use, you can take an icon from the SVG fork of `Font-Awesome`: [link](https://github.com/encharm/Font-Awesome-SVG-PNG).