Made link more explicit, the markdown generation was creating a relative path incorrectly.

The markdown is generating a weird link: 

```
<p>Please use <a href="/jed/cookie-node/blob/master/jed/cookies">Cookies</a> instead.
```

and it should be

```
<p>Please use <a href="/jed/cookies">Cookies</a> instead.
```

I made the link more explicit. (https://github.com/jed/cookies)