- URL routes now defaulty required authentication if
force_authentication special function is defined.
- handle_request() now trigger a fatal error if user try to access to
a required route and if force_authentication function is not defined.
- logging() now retreive username from $auth_user['username'].
It's permit to access raw URL parameter values without automatic
urldecode when access using $_GET or $_REQUEST. Also add
UrlRequest::get_param() method that allow to access raw parameters
values (without any decoding).
