- added middlewares and router supporting simplified account routes
 - simplified account opt in: directs the user to an appropriate error message if a simplified account route is accessed without the user being opted in and the feature being enabled for the environment
 - simplified account strategy: retrieves the correct gateway account for the service and account type and makes this available on the request object
- added service settings navigation nunjucks template and supporting sass
- added settings controllers
 - index: redirects the user to the correct default setting based on the account type and go live stage of the service
 - service name: get and post actions for viewing and updating the current service name in english and welsh
 - email notifications: bare bones implementation of the view
- external dependency: express-validations, creates easy to understand validation chains used for parsing request bodies
- added utilities
 - nunjucks filter for correctly capitalising service settings and categories
 - generator for simplified account paths
 - settings builder: determines which settings should be visible based on the service go live stage, account type and permissions of the viewing user