Updates no results view.

Shows "Fetching posts..." status and fixes an issue with the no posts message flickering briefly.
Fixes #1663 
Also removes an unneeded import.

After (fetching): 
![ios simulator screen shot jul 16 2014 3 27 57 pm](https://cloud.githubusercontent.com/assets/1435271/3605183/a4b49cc6-0d28-11e4-85ab-dad0256f9db7.png)

After (not following any blogs): 
![ios simulator screen shot jul 16 2014 3 27 33 pm](https://cloud.githubusercontent.com/assets/1435271/3605169/89de324a-0d28-11e4-8adb-e6fb5431f241.png)