Added image to README.md.

Author: chschmitz

README.md

@@ -34,6 +34,9 @@ added to it for demonstration purposes:
 Other features include:
 
  * Output of cycles in [Graphviz](http://www.graphviz.org) format for visualization
+ 
+ ![Cycles graph](src/site/resources/images/graph.png)
+ 
  * Aggregation of packages to a certain depth
  * Optional inclusion of test classes
  * Output of the class-level dependencies