For usage we recommend the Online usage page.
The source code is available here. Please also download, and put on the CLASSPATH, Jython and files.jar available here.
If you are on a Unix based OS, here is a shell run to be able to compile m4s2:
$ ls
files.jar  jython.jar  m4s2.tar.gz
$ tar zxf m4s2.tar.gz 
$ cd src
$ export CLASSPATH=../jython.jar:../files.jar:.
$ javac org/tiago/ogarak/Main.java
$ java org.tiago.ogarak.Main