Updated the readme.

Following the ISWC reviews, I added a link to the wiki.

README.md

@@ -2,8 +2,8 @@ GERBIL
 ========
 <i>General Entity Annotator Benchmark</i>
 
-This project is a benchmark for entity annotation and disambiguation tools.
+This project is a benchmark for entity annotation and disambiguation tools. Please take a look into the [wiki](https://github.com/AKSW/gerbil/wiki) or visit the [project home page](http://aksw.org/Projects/GERBIL.html) for more informations.
 
 <img src="http://139.18.2.164/mroeder/gerbil/gerbil_logo.png">
 
-For more information have a look at http://aksw.org/Projects/GERBIL.html
+