Feature: Story follows task status - additional option.

I add some additional feature to backlogs 'Story follows task status' option which can be enabled/disabled on backlog settings page with a radio button described as "Resolved when all Tasks are closed. In Progress when even one Task is not new.". It works just like name says: if every task in story is closed, it changes story status to 'resolved'; also if even one task in not new (is not default) it changes story status to in progress.