View source for Newsreader/Salvo UI Integration in the workbench/Work done during July 21 to July 27

I implemented the functionality "synchronizing the store with the server periodically".
User is given the chance to set the synchronizing time interval through the Salvo preference page.

Once new articles are fetched, the digest view is updated automatically with the newly fetched articles.

A desktop notification is displayed once new articles are fetched.

Now I am working on making the current implementation stable.