Putting the boot icon on the same line as the member name in group members

This was bugging me, since before this change the members of a group take up a ton of vertical space. I'm using the [bootstrap media component](http://getbootstrap.com/components/#media) so no additional CSS needed to be written. This works well for both admins and non-admins, and I tested it using the provided HabitRPG Vagrant box. 

Here's a before/after comparison:

![image](https://cloud.githubusercontent.com/assets/629982/4547500/a7059b18-4e4d-11e4-850a-a3d58178cc33.png)

![image](https://cloud.githubusercontent.com/assets/629982/4547482/8a501c50-4e4d-11e4-8b4a-a9c027f38d0c.png)