Created notification service with tests.
Removed references to sinon clock in notification service tests.
Added notifications service to search service.
Updated JSDoc for search service.
Added notifications and styles to view.
Added notifications to map controller (currently not used in controller).
Added notifications service to results controller. Required installing angular-sanitize.
Notification service now takes an optional options object. Currently respects one property, 'singleton', that prevents a notification from being displayed multiple times.
No results message from results controller now a singleton. Fixed bug with singleton notifications in notification service.