Improvements to No Results on issues page

I have not added the labels, I'll open a new issue
r? @calexity 
![issue](https://cloud.githubusercontent.com/assets/1997108/5057889/a237a180-6cd9-11e4-9347-c1870289b670.png)

@miketaylr , One thing, you think it is possible to hide the pagination if there is no result?