Add fc-container classes to merchandising components and fix spacing

This adds puts the commercial components in fc-container classes to correct the spacing issues.

We then remove the bottom padding for the low commercial component so it sits correctly above the footer.

Before;
![screen shot 2014-12-09 at 10 22 12](https://cloud.githubusercontent.com/assets/1303616/5355682/64c30fb2-7f8d-11e4-9507-346ef3b59d16.png)

After;
![screen shot 2014-12-09 at 10 22 56](https://cloud.githubusercontent.com/assets/1303616/5355686/69a58730-7f8d-11e4-829a-2e668e92b2a6.png)

does this need the `&`?