Checked in Macro Jez's additions to osgText to support .osg IO make it

a fully functioning NodeKit.

Also reimplement notify() to try an prevent a crash which has been caused by
to objects in notify.cpp being initiliazed twice, the second time the auto_ptr
holding the dev/null ofstream was being initilized to 0.

include/osgText/Font

@@ -85,7 +85,10 @@ class OSGTEXT_EXPORT Font : public osg::Object
 
         int        getPointSize(void) const    { return _pointSize; }
         int        getTextureSize(void) const    { return _textureSize; }
-        const std::string& getFontName();
+        const std::string& getFontName() const { return _fontName; }
+        
+        /// Transfer font settings to another Font object and invalidate this one.
+        void copyAndInvalidate(Font &dest);
 
         FTFont*     getFont(void) { return _font; }