Removing support for AppError.  It doesn't make sense to have hardcoded class references when there is better configuration available. Updating doc blocks for exceptions. Updating core.php file.
Removing support for AppError.  It doesn't make sense to have hardcoded class references when there is better configuration available.
Updating doc blocks for exceptions.
Updating core.php file.


	See: cakephp/cakephp@f3feb1575c0f42f08b93c44c16661c46cb44c5fb


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