Added support for writing the file path of a script to the lua package.path to help with loading scripts within lua.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14451 16af8721-9629-0410-8352-f15c8da7e697

src/osgPlugins/lua/LuaScriptEngine.h

@@ -239,6 +239,10 @@ class LuaScriptEngine : public osg::ScriptEngine
         std::string lookUpGLenumString(GLenum value) const;
         GLenum lookUpGLenumValue(const std::string& str) const;
 
+
+        void addPaths(const osgDB::FilePathList& paths);
+        void addPaths(const osgDB::Options* options);
+
     protected:
 
         void initialize();