Changed doxygen docs to indicate deprecated status with suggestion of IntersectionVisitor instead.

include/osgUtil/IntersectVisitor

@@ -31,12 +31,7 @@ namespace osgUtil {
 
 class OSGUTIL_EXPORT Hit
 { 
-    /** Describes a point in space produced by an intersection of a line with a scene.
-      * A Hit is always on a surface as rendered by the Open Scene Graph scene (usually
-      * a triangle or other primitive, but a special hit handler could return a
-      * different value perhaps: a sphere shape might return a Hit on the true sphere
-      * rather than the approximate tessellated sphere rendered.
-      */
+    /** Deprecated */
     public:
 
         Hit();
@@ -94,7 +89,7 @@ class OSGUTIL_EXPORT Hit
 };
 
 
-/** Basic visitor for ray based collisions of a scene.*/
+/** Deprecated - use IntersectionVisitor instead.*/
 class OSGUTIL_EXPORT IntersectVisitor : public osg::NodeVisitor
 {
     public: