Added osg::Drawable::PrimitiveFunctor and TriangleFunctor subclass for

querrying the primitive data inside Drawables.  Moved various support
classes over from being osg::GeoSet based to osg::Geometry based.

src/osgUtil/Optimizer.cpp

@@ -64,9 +64,9 @@ void Optimizer::optimize(osg::Node* node, unsigned int options)
 
     }
     
-//     // convert the old style GeoSet to Geometry
-//     ConvertGeoSetsToGeometryVisitor cgtg;
-//     node->accept(cgtg);
+    // convert the old style GeoSet to Geometry
+//    ConvertGeoSetsToGeometryVisitor cgtg;
+//    node->accept(cgtg);
 
 
     if (options & SHARE_DUPLICATE_STATE)