Update readme file

README.md

@@ -2,3 +2,20 @@ TotemTwist
 ==========
 
 Displays a fake Windfury Totem cooldown on your action bar for easier totem twisting.
+
+![screen](http://siarkowy.net/img/TotemTwist.png)
+
+Support for:
+* Bartender 3
+* Bongos 2
+* Blizzard UI
+
+For use with patch 2.4.3 only.
+
+Installation
+------------
+
+* Use the `Download ZIP` button on the right.
+* Open the archive and navigate into the `TotemTwist-master` directory.
+* Copy appropriate addon into your `Wow\Interface\AddOns\` folder.
+* Launch or restart the game client and check whether installation succeeded.