Unread count in favicon

[Poorchop]

Since selfoss doesn't have any kind of notification system, it would be cool if the favicon could be updated to reflect the unread message count. For those of us who leave selfoss open in a background tab in the web browser, this would alleviate the need to keep switching to the selfoss tab to check for unread stories. I know that gmail has a system like this in place, so I'm thinking that it should be possible in selfoss too.

There are already some JavaScript libraries for accomplishing this, including this one.