Added Stats::collectStats(string,bool) controls, getAveragedAttribute methods into osg::Stats class, and

related support into osgViewer::Viewer and osgViewer::StatsHandler.

Added lazy updating of text in StatsHandler HUD to minimize the impact of
slow text updating on observed frame rates.

src/osgWrappers/osgViewer/View.cpp

@@ -13,6 +13,7 @@
 #include <osg/Camera>
 #include <osg/DisplaySettings>
 #include <osg/Node>
+#include <osg/State>
 #include <osgGA/EventQueue>
 #include <osgGA/GUIEventHandler>
 #include <osgGA/MatrixManipulator>
@@ -28,6 +29,29 @@
 #undef OUT
 #endif
 
+BEGIN_OBJECT_REFLECTOR(osgViewer::EndOfDynamicDrawBlock)
+	I_BaseType(osg::State::DynamicObjectRenderingCompletedCallback);
+	I_Constructor0(____EndOfDynamicDrawBlock,
+	               "",
+	               "");
+	I_Method1(void, completed, IN, osg::State *, state,
+	          __void__completed__osg_State_P1,
+	          "",
+	          "");
+	I_Method0(void, block,
+	          __void__block,
+	          "",
+	          "");
+	I_Method0(void, release,
+	          __void__release,
+	          "",
+	          "");
+	I_Method1(void, set, IN, unsigned int, blockCount,
+	          __void__set__unsigned_int,
+	          "",
+	          "");
+END_REFLECTOR
+
 TYPE_NAME_ALIAS(std::list< osg::ref_ptr< osgGA::GUIEventHandler > >, osgViewer::View::EventHandlers);
 
 BEGIN_OBJECT_REFLECTOR(osgViewer::View)