OpenSceneGraph 3.1.9 development release

OpenSceneGraph-3.1.9, released on 2nd July 2013, key deliverables in this dev release are:

source package : OpenSceneGraph-3.1.9.zip

svn tag: svn co http://svn.openscenegraph.org/osg/OpenSceneGraph/tags/OpenSceneGraph-3.1.9 OpenSceneGraph