Added computeDataVariance method into osg::Object and implementations in Drawable and StateSet,

and calling of osgUtil::StaticObjectDetectionVisitor in osgViewer::Viewer

src/osgWrappers/osgText/FadeText.cpp

@@ -24,7 +24,7 @@
 #undef OUT
 #endif
 
-BEGIN_ABSTRACT_OBJECT_REFLECTOR(osgText::FadeText)
+BEGIN_OBJECT_REFLECTOR(osgText::FadeText)
 	I_BaseType(osgText::Text);
 	I_Constructor0(____FadeText,
 	               "",

src/osgWrappers/osgText/Font.cpp

@@ -28,7 +28,7 @@
 #undef OUT
 #endif
 
-BEGIN_ABSTRACT_OBJECT_REFLECTOR(osgText::Font)
+BEGIN_OBJECT_REFLECTOR(osgText::Font)
 	I_BaseType(osg::Object);
 	I_ConstructorWithDefaults1(IN, osgText::Font::FontImplementation *, implementation, 0,
 	                           Properties::NON_EXPLICIT,
@@ -295,7 +295,7 @@ BEGIN_ABSTRACT_OBJECT_REFLECTOR(osgText::Font::FontImplementation)
 	I_PublicMemberProperty(osgText::Font *, _facade);
 END_REFLECTOR
 
-BEGIN_ABSTRACT_OBJECT_REFLECTOR(osgText::Font::Glyph)
+BEGIN_OBJECT_REFLECTOR(osgText::Font::Glyph)
 	I_BaseType(osg::Image);
 	I_Constructor0(____Glyph,
 	               "",

src/osgWrappers/osgText/Text.cpp

@@ -107,7 +107,7 @@ BEGIN_ENUM_REFLECTOR(osgText::Text::ColorGradientMode)
 	I_EnumLabel(osgText::Text::OVERALL);
 END_REFLECTOR
 
-BEGIN_ABSTRACT_OBJECT_REFLECTOR(osgText::Text)
+BEGIN_OBJECT_REFLECTOR(osgText::Text)
 	I_BaseType(osg::Drawable);
 	I_Constructor0(____Text,
 	               "",