title: Custom error handling
body: <p>I am developing a component in joomla 2.5, my component sends a request to some url and gets the response object. If i  pass wrong url, joomla takes me to the default page of Error : 500 - No response code found . I want that if user install my component and mistakenly they put wrong url ,  it should show some custom error message/page which should more meaningful to non-programming person rather than taking user to default error page. Is there some way to add this type of functionality in Joomla without editing template/error.php file in core.</p>