updated service links with icon

[finishes: #81856036]

![screen shot 2014-11-04 at 1 53 16 pm](https://cloud.githubusercontent.com/assets/923211/4906879/9eac99ce-645c-11e4-8b18-ebf0957ae4c6.png)

```
expect(link.linked_to_service).to eq fake_service
```
... something like that
the alternative would be to expect that #find got called on Service with the expected arguments