Added automatically removal from the OjbectCache when a object or it's subgraph contain Texture that no longer have an osg::Image.
Added automatically removal from the OjbectCache when a object or it's subgraph contain Texture that no longer have an osg::Image.

scrawl/osg,openscenegraph/osg,scrawl/osg,openscenegraph/osg,scrawl/osg,openscenegraph/osg,openscenegraph/osg,scrawl/osg