github urls don't have www

I receive the daily remainder for 24pullrequests and it had repeated elements, because one url had `www.` and the other didn't. Github doesn't use `www.` and redirects `www.` to non `www.`

![screen shot 2014-12-20 at 10 23 43 pm](https://cloud.githubusercontent.com/assets/1312687/5517137/e37ef020-8896-11e4-9ad8-f3e10f2d1436.png)