NotificationView doesn't need to extend Observer.
Add simple ModalView with test in RecordView.
Add specialized modal for adding augmented properties ModalAugmentView.
Display 'timeline' and 'map' views when augmenting a new property.
Display notification when new property is created from ModalAugmentView.
Modify Observer so that each object that extends it can have its own list of pub/sub events.
Merge branch 'feature/modal-view' into develop