Makes possible to inherit from Oauth2\Request and use own Request class instead of original

[hiqdev]

Makes possible to use own featured Request like this:

MyRequest extends \OAuth2\Request {
    public function someCoolFeature ($arg) {
        return $it;
    }
};

$request = MyRequest::createFromGlobals();

$server->handleTokenRequest($request);

[bshaffer]

I love it! Thank you.

[hiqdev]

Glad to hear it :)
Thank you for the library!