Uncaught exceptions on the console would result in exit code 0.
This is not helpful in *nix scripting.
- Update the ConsoleErrorHandler to not inherit from the web error handler.
- Make ErrorHandler::_mapErrorCode() public as it isn't overly private.
- Make ConsoleErrorHandler methods instance methods so mocking can be done.
- Add a _stop method to correctly exit.
- Update tests.
using big po files causes a lot of noise to be loaded whenver the
langauge domain is touched - therefore avoid any cli messages from being
loaded by web requests at all.
