Adding opened and closed status as a part of notification message. 

Only opened and closed status will send notification to Hipchat. Updating version. Adding link for a repo to message. Possible statuses are: “assigned”, “unassigned”, “labeled”, “unlabeled”, “opened”, “closed”, or “reopened”, or “synchronize”. 

- [ ] Change log
- [ ] Demo page
- [ ] Product owner signoff

Don't need the `else` side, it will return nil by default.