NotificationBlock: Implements dynamic attributes cache
Updates Bridging Header
Implements NotificationBlock dynamic attributes caching
NoteTableViewCell: Refesh backgrounds only if needed
Merge branch 'release/4.7' into issue/2904-notifications-performance-improvements
NoteTableViewCell: One placeholder to render them all
NoteTableHeaderView: Nukes draw code
Updates UIImageView+Networking Helpers
NoteTableViewCell: Performance Optimization
WPStyleGuide+Notifications: Really, one placeholder to display them all
Merge branch 'release/4.7' into issue/2904-notifications-performance-improvements
Notification: Adds new helpers
Wires Notification Helpers
WPStyleGuide+Notifications: Exposing Constants
Implements OldSchool NoteTableViewCell height Calculation
Notification: Using properties
NoteTableViewCell: Fixes alignment
Merge pull request #2911 from wordpress-mobile/issue/2904-notifications-performance-improvements

NotificationsViewController Performance Improvements
Merge remote-tracking branch 'origin/release/4.7' into develop

Conflicts:
	WordPress/Classes/ViewRelated/Notifications/Controllers/NotificationsViewController.m