updated version

Author: fehguy

README.md

@@ -40,7 +40,7 @@ You need the following installed and available in your $PATH:
 
 <li>- Apache maven 3.0.4 or greater (http://maven.apache.org/)
 
-### To build from source (currently 1.3.7)
+### To build from source (currently 1.3.9)
 ```
 # first time building locally
 mvn -N