Added better handling in computeIntersections(..) of nodes that are internal
to the scene graph, correctly accounting for the accumulated transforms.
Changed the EventVisitor so that it only traveses active children rather than
all children.
Updated wrappers.
and osgProducer to osgWrappers directory.
Enabled the build of osgWrappers/osg, osgWrappers/osgPartile and osgWrappers/osgSim,
but not osgUtil, osgDB, osgFX, osgTerrain, osgGA and osgProducer due to compile
errors. I am assuming that these compilers are fixable so I'm checked all the
source code so that members of the community can help fix them.
