Added WWW-Authenticate response header to avoid Kohana 3.3 exception on 401 HTTP_Exceptions

Signed-off-by: Darren Ehlers <me@darrenehlers.com>
Removed test auth HDR generation code comments

Signed-off-by: Darren Ehlers <me@darrenehlers.com>
Merge pull request #4 from DoubleNode/master

Added WWW-Authenticate response header to avoid Kohana 3.3 exception on 401 HTTP_Exceptions
Encapsulating @ehlersd's solution for bypassing the "www-authenticate" issue
Changed HTTP error messages fallback to be the Kohana Response core's messages, instead of custom module messages.
Merge remote-tracking branch 'upstream/master'