Requests
blah
The main request
request::instance() gets the main request, you set the response in the bootstrap (usually), you use $request->status to send a 404 or other status, $request->headers to send headers, is_ajax, etc.
Subrequests
TODO: This will talk about subrequests.
http://kerkness.ca/wiki/doku.php?id=hmvc_in_kohana
http://kerkness.ca/wiki/doku.php?id=routing:differ_request_for_internal_and_external