Cookies and QueryString support

New helpers for cookies:

• $res->cookie($name, $value, $settings) - sets a cookie
• $res->clearCookie($name) - removes a cookie
• $req->cookies - gets the cookies

Querystring now supported:

• $req->query - contains the querystring params

New helpers for redirections:

• $res->location($url) - redirects using Location header
• $res->redirect($url) - redirects using 302 http code
• $res->redirect($url, true) - redirects using 301 (http permanent redirect code)

Also:

• Added $res->download($path, $name) - forces the download of a file
• Added $express->getInfo() - retrieves all the info from the current request
• App locals now supported in object $express->locals