Correct scope of operator calls

- Enhance reflection module to indicate inheritance
  - Add ability to catch errors thrown from a eval
    inside of a script

src/reflection.cpp

@@ -49,6 +49,7 @@ CHAISCRIPT_MODULE_EXPORT  chaiscript::ModulePtr create_chaiscript_module_reflect
   m->add(chaiscript::fun(&has_parse_tree), "has_parse_tree");
   m->add(chaiscript::fun(&get_parse_tree), "get_parse_tree");
 
+  m->add(chaiscript::base_class<std::exception, chaiscript::exception::eval_error>());
 
   chaiscript::bootstrap::standard_library::vector_type<std::vector<boost::shared_ptr<chaiscript::AST_Node> > >("AST_NodeVector", m);