Use names not IDs in follower flash messages

If you click twice quickly on a Follow/Unfollow button then when the page loads you'll get a message like:

![Screenshot from 2012-12-20 16:44:49](https://f.cloud.github.com/assets/22498/24900/b7d848ac-4ac4-11e2-9f0f-ebd7aa690e2e.png)

It should say the object's display name not id