Add Fixed Large Fast XV, Fixed Medium Fast XI, and Fixed Medium Slow VII

![screen shot 2014-09-23 at 18 30 02](https://cloud.githubusercontent.com/assets/1001642/4376640/569709c0-4347-11e4-930f-0778fc989d59.png)

![screen shot 2014-09-23 at 18 30 07](https://cloud.githubusercontent.com/assets/1001642/4376643/5a4de7c8-4347-11e4-98cc-1a2651e2bd28.png)

![screen shot 2014-09-23 at 18 30 12](https://cloud.githubusercontent.com/assets/1001642/4376646/5ce298bc-4347-11e4-8faa-2f51437d9c7a.png)

Also fixes a bug with col span in items, and a margin issue between Facia slices, and a bug where later slices were getting the same stories as earlier ones.