Refactor API notification usage

- Remove "mapFields()" from BaseModel
- Add new Notification API entity (including collection)
- Add new NotificationFactory method "getApiList()"

src/DI.php

@@ -280,14 +280,6 @@ abstract class DI
 		return self::$dice->create(Model\User\Cookie::class);
 	}
 
-	/**
-	 * @return Repository\Notify
-	 */
-	public static function notify()
-	{
-		return self::$dice->create(Repository\Notify::class);
-	}
-
 	/**
 	 * @return Model\Storage\IStorage
 	 */
@@ -324,6 +316,14 @@ abstract class DI
 		return self::$dice->create(Repository\ProfileField::class);
 	}
 
+	/**
+	 * @return Repository\Notify
+	 */
+	public static function notify()
+	{
+		return self::$dice->create(Repository\Notify::class);
+	}
+
 	//
 	// "Protocol" namespace instances
 	//