Updated status code and source information

Source 1: Hypertext Transfer Protocol -- HTTP/1.1 RFC 2616 Fielding, et al.
          http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

Source 2: http://en.wikipedia.org/wiki/List_of_HTTP_status_codes

Source of the status code and description is assumed to be Source 1 unless otherwise noted.