Organize Connected Accounts into Groups

Closes #2147. This bites off some of the UI parts done in the `coinbase` branch.

- organize accounts by Group (social accounts, recurring money and one-off payments)
- heading for one-off payments section changed based whether you’re viewing your own profile

![screen shot 2014-03-16 at 6 21 16 pm](https://f.cloud.github.com/assets/65468/2432196/4ffd08f0-ad59-11e3-906f-5f70693fdece.png)