adding a note about custom error handler classes
adding a note about custom error handler classes


	See: cakephp/cakephp@f792136c261acf7e10f00aa31ef33715adf3a931


QoboLtd/project-template-cakephp,QoboLtd/project-template-cakephp,QoboLtd/project-template-cakephp,ojengwa/cake-appengine,QoboLtd/project-template-cakephp,makallio85/fish-diary,QoboLtd/project-template-cakephp,makallio85/fish-diary,makallio85/fish-diary,ojengwa/cake-appengine