Updated Data Controller & Model to use the new ErrorHandler() Function from the Core controller.
Changed all database errortypes to 'danger' in Data Controller.
Updated ErrorHandler() function in Core Controller so that if no Error object is sent it it returns the Production message (so I don't have to retype it for custom errors).
Updated Document Controller & Model and Views to use the new Error Handler except for the OpenPage() and HasPage() functions in Document Controller.