Added keyboard mouse binding usage to the osg::ApplicationUsage and

osgGA::GUIEventHandler and its subclasses.

include/osgGA/StateSetManipulator

@@ -34,6 +34,8 @@ public:
         StateSetManipulator();
         virtual ~StateSetManipulator();
 
+        virtual const char* className() { return "StateSetManipulator"; }
+
         /** attach a geostate to the manipulator to be used for specifying view.*/
         virtual void setStateSet(osg::StateSet*);
 
@@ -49,6 +51,9 @@ public:
         /** Handle visitations */
         virtual void accept(GUIEventHandlerVisitor&);
 
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
 protected:
 
         // Reference pointer to a geostate