added freeimage-3.13.1 for snow leopard build.
added freeimage-3.13.1 for snow leopard build.

id774/fastladder,toshimaru/fastladder,ykzts/fastladder,onk/fastladder,ssig33/fastladder,r7kamura/fastladder,ykzts/fastladder,onk/fastladder,fastladder/fastladder,id774/fastladder,fastladder/fastladder,id774/fastladder,fastladder/fastladder,r7kamura/fastladder,ssig33/fastladder,toshimaru/fastladder,toshimaru/fastladder,onk/fastladder,ykzts/fastladder