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/Text

@@ -72,6 +72,7 @@ class OSGTEXT_EXPORT Text : public osg::Drawable
         virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new Text(*this,copyop); }
         virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const Text*>(obj)!=NULL; }
         virtual const char* className() const { return "Text"; }
+        virtual const char* libraryName() const { return "osgText"; }        
 
         void setPosition(const osg::Vec2& pos);
         void setPosition(const osg::Vec3& pos);