Add(errorHandling.js).
Refactor(common/errorHandling/errorHandler.js): rename directory and js file to 'errorHandler'.

Add(errorHandler.spec.js).
Modify(errorHandler.js): add a controller; implement broadcasting of a 'business-error' event.
Modify(errorHandler.js): add 'ReceivedErrors' factory; implement handling of system, validation and business errors.