This framework is no longer under active devlopment. With iOS 10, you can now display native system notifications inside your app. I suggest migrating to Apple's new API going forward. This framework remains useful for iOS 8 & 9 support. New features will likely not be implemented, but bugs may be fixed.
LNNotificationsUI is a framework for displaying notifications similar to Apple's iOS 8 and iOS 9 notifications. It is meant to complement the native look and feel, by providing a pixel-accurate (as much as possible) recreation of the notifications.