Fix for Java 1.6 compatibility.

I saw this was not Java 6 compatible and since mc officially supports Java 6 I quickly edited it to work with 6.

Unfortunately jAstyle is compiled for Java 7 but seems to work with Java 6 if recompiled. So I added the lib dir and quickly compiled it for 6.

Regards Joshua Coles.

P.S. This is my pull request so it may be messed up.