Notification.java:42-46: Create Smart decorator to get other...

The puzzle `920-1bdea297` in [`src/main/java/com/jcabi/github/Notification.java`](https://github.com/jcabi/jcabi-github/blob/master/src/main/java/com/jcabi/github/Notification.java) (lines 42-46) has to be resolved: Create Smart decorator to get other properties of Notification, such as reason, unread, updated_at, last_read_at, url, etc. See https://developer.github.com/v3/activity/notifications/#view-a-single-thread for details. Don't forget about unit tests.

The puzzle was created by Piotr Pradzynski on 09-Oct-15.

Estimate: 30 minutes, role: IMP.

If you have any technical questions, don't ask me, submit new tickets instead. The task will be "done" when the problem is fixed and the text of the puzzle is removed from the source code. Here is more about [PDD](http://www.yegor256.com/2009/03/04/pdd.html).