Add Accounts Page

![screen shot 2014-09-12 at 12 27 49 pm](https://cloud.githubusercontent.com/assets/1174461/4255234/e6cf3a1e-3ab2-11e4-868a-35c769b65670.png)


https://trello.com/c/6AyMCv1t
If so, I think we could simplify this with:

```ruby
@org_repos, @personal_repos = @repos.partition { |repo| repo.in_organization? }
```

I believe that would also let us delete the new `personal?` method in this PR.