Fixes for IRIX build.

Updates to the osg::Transform, adding preMult and postMult methods and
deprecating the old preRotate,preTranslate,preScale.

Updated the rest of the OSG so that it nolonger uses the deprecated
osg::Transform nodes.

Renamed osgUtil::SceneView::setGlobalState() to
osgUtil::SceneView::setGlobalStateSet() so that the name reflects its
functionality better.  Updated osgGLUT::Viewer etc to cope with new
name change.

src/osgUtil/SceneViewManipulator.cpp

@@ -18,7 +18,7 @@ void SceneViewManipulator::setSceneView(SceneView* sv)
     _sv=sv;
     _cm->setNode(sv->getSceneData());
     _cm->setCamera(sv->getCamera());
-    _gm->setStateSet(sv->getGlobalState());
+    _gm->setStateSet(sv->getGlobalStateSet());
 }
 
 SceneView *SceneViewManipulator::getSceneView()