Initial refactor of Note into a separate service.

Still need to create Remote service to extract networking code from the NoteService.
Updated copyright information in new classes
Extracted remote calls into a separate class NoteServiceRemote
Fixed missing method implementation due to name change
Merge pull request #1515 from wordpress-mobile/feature/refactor-note-into-service

Refactor Note to separate business logic
Merge branch 'develop' into issue/1508-notifications-badge-detail-view

Conflicts:
	WordPress/Classes/Note.m
	WordPress/Classes/NotificationsViewController.m
A bit more code cleanup.