Convert GraphicsThread/GraphicsOperation to more generic OperationsThread/Operation.

This paves the way to running cull traversals in seperate threads.

Updated wrappers

src/osgWrappers/osgUtil/SceneView.cpp

@@ -588,6 +588,10 @@ BEGIN_OBJECT_REFLECTOR(osgUtil::SceneView)
 	          __void__draw,
 	          "Do draw traversal of draw bins generated by cull traversal. ",
 	          "");
+	I_Method0(unsigned int, getDynamicObjectCount,
+	          __unsigned_int__getDynamicObjectCount,
+	          "Compute the number of dynamic objects that will be held in the rendering backend. ",
+	          "");
 	I_Method0(void, releaseAllGLObjects,
 	          __void__releaseAllGLObjects,
 	          "Release all OpenGL objects from the scene graph, such as texture objects, display lists etc. ",
@@ -637,6 +641,9 @@ BEGIN_OBJECT_REFLECTOR(osgUtil::SceneView)
 	I_SimpleProperty(GLenum, DrawBufferValue, 
 	                 __GLenum__getDrawBufferValue, 
 	                 __void__setDrawBufferValue__GLenum);
+	I_SimpleProperty(unsigned int, DynamicObjectCount, 
+	                 __unsigned_int__getDynamicObjectCount, 
+	                 0);
 	I_SimpleProperty(osg::FrameStamp *, FrameStamp, 
 	                 0, 
 	                 __void__setFrameStamp__osg_FrameStamp_P1);