Added VERY EXPERIMENTAL sound system for "breaking" wood . WARNING: Make sure that your speakers / headphones are turned off - it may play sound very loud!

Added VERY EXPERIMENTAL sound system for "breaking" wood . WARNING: Make sure that your speakers / headphones are turned off - it may play sound very loud!

You should also have AVBin library installed (http://avbin.github.com/AVbin/Download.html), which should be installed with pyglet as default.