Add fixed slow small IV (QQQQ) container

Desktop views:

![screen shot 2014-09-16 at 13 51 41](https://cloud.githubusercontent.com/assets/1001642/4287273/bc505eb2-3da0-11e4-8a7f-045e2a841a1a.png)

![screen shot 2014-09-16 at 13 51 50](https://cloud.githubusercontent.com/assets/1001642/4287279/c4232a3e-3da0-11e4-8119-ca89edba75b3.png)

![screen shot 2014-09-16 at 13 52 04](https://cloud.githubusercontent.com/assets/1001642/4287280/c66cfedc-3da0-11e4-9ca8-820c18d8e488.png)

![screen shot 2014-09-16 at 13 52 17](https://cloud.githubusercontent.com/assets/1001642/4287284/c9629b2e-3da0-11e4-8cb3-0cd0148f7f8a.png)

![screen shot 2014-09-16 at 13 52 33](https://cloud.githubusercontent.com/assets/1001642/4287286/cc1a1914-3da0-11e4-8553-a77ed3139826.png)

Tablet view:

![screen shot 2014-09-16 at 16 10 11](https://cloud.githubusercontent.com/assets/867233/4289433/93fd7bc6-3db3-11e4-99c5-ce119874eb0f.png)

Mobile view:

![screen shot 2014-09-16 at 13 53 16](https://cloud.githubusercontent.com/assets/1001642/4287295/dde9dd1e-3da0-11e4-8489-082b04d220c8.png)


Thanks for looking at this. extend is a little bit better but in this case (we need to stop using nesting as much as we can) as we are nesting it will create a quite large selectors.

I understand that we want to ship today so this definitely isn't a show stopper. I am happy to pick this up for small refactor later. 

FYI:
http://sassmeister.com/gist/24406746a917cec0e6ef <-- extend
http://sassmeister.com/gist/58d2bba8cd71bc98840a <-- without extend