make the logograph showed initialy

src/main/Main.java

@@ -17,7 +17,7 @@ public class Main {
      * @param args the command line arguments, currently not in use
      */
     public static void main(String[] args) {
-        Reader r = new Reader( "papergraph.json" );
+        Reader r = new Reader( "logo.json" );
         LayeredGraphNode graph = r.readInputGraph();
         InitializeNodePositions.placeNodes( graph );
         new MainView( graph );