wrap lua object into java object

- to ease handling wrap lua object to java object

java/org/artisanlogiciel/lua/LuaString.java

@@ -10,6 +10,11 @@ public class LuaString
         string = stringBuffer.toString();
     }
 
+    @Override
+    public Object wrapToJava() {
+        return string;
+    }
+
     @Override
     public String toString() {
         return '"' + string + '"' ;