Add ability to mark other phone numbers as primary

Add a button next to non primary phone numbers to enable users to change which is default/primary. This one might need some styling love, though.
![screen shot 2013-05-09 at 4 35 08 pm](https://f.cloud.github.com/assets/152134/485037/00a2fcee-b8e8-11e2-913d-b05496cc6213.png)