#80 - how to use JAR binding files with libGDX

Trying to help out with issue #80. If I have this right, please accept it as a pull request, thanks. Based on information found here: http://www.badlogicgames.com/forum/viewtopic.php?t=14655&p=63863 and the corresponding changes I made to my own project to confirm that it all works ok.
Merge pull request #92 from mikemee/patch-2

Added instructions on how to use JAR binding files with libGDX.