Added flattr button

README.md

@@ -8,6 +8,8 @@ If you just want to see OpenRaider doing something on your Mac, without installi
 
 It seems as if OpenRaider will currently only work on Little-Endian platforms. This is not nice and will hopefully be fixed in the future!
 
+[![Flattr this git repo](http://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=xythobuz&url=https://github.com/xythobuz/OpenRaider&title=OpenRaider&language=&tags=github&category=software)
+
 ## Configuration
 
 OpenRaider needs some configuration files, and level data and assets from custom levels or the Tomb Raider games.