Merge pull request #372 from openscenegraph/text_improvements

Text improvements, introducing implementation of Signed Distance Function texture generation and new shaders for outlines and shadows replacing old multi-pass approach

include/osgUtil/GLObjectsVisitor

@@ -97,6 +97,9 @@ class OSGUTIL_EXPORT GLObjectsVisitor : public osg::NodeVisitor
         void apply(osg::Drawable& drawable);
         void apply(osg::StateSet& stateset);
 
+        /** Do a compile traversal and then reset any state,*/
+        void compile(osg::Node& node);
+
     protected:
 
         typedef std::set<osg::Drawable*> DrawableAppliedSet;