print is a function in Python 3

Thanks @cclaus

Author: LeeKamentsky

demo/demo_nogui_with_stmt.py

@@ -15,5 +15,5 @@
 import javabridge
 
 with javabridge.vm(run_headless=True):
-    print javabridge.run_script('java.lang.String.format("Hello, %s!", greetee);', 
-                                dict(greetee='world'))
+    print(javabridge.run_script('java.lang.String.format("Hello, %s!", greetee);', 
+                                dict(greetee='world')))