New method which can return mocked method.

[kocoureasy]

I put simply method which can return reference of mocked method.

I have problem when I want to now when program run some method,
than first I mocked this method to some own function and when called this mocked method,
than I can call all code too, such as this example:

mock("CGI","header", sub {

... doing something

$code = mocked("CGI", "header");
&$code(); # run old mocked method
});

[sukria]

Thanks for the pull request, but can you provide update the unit tests as well, to cover the new "mocked" method?

Thanks