Add Options and Head to RequestBuilding
routing: fix `optionalCookie` directive leaking MissingCookieRejection
routing: add `cancelRejection` directive, improve `authorize` and `respondWithMediaType` directives
routing: extend and improve `respondWithDirectives`
Merge pull request #294 from vjousse/request-building-options-head

Add Options and Head to RequestBuilding
add multiple arguments to setCookie and deleteCookie directives