Fixed social icons being pushed down on medium screens.

This PR fixes social icons expanding the sidebar vertically on smaller screens.
 
Before: 
![screen shot 2013-12-06 at 7 13 46 pm](https://f.cloud.github.com/assets/289269/1697609/01c92092-5eee-11e3-8fc8-adca8c6cf957.png)

After:
![screen shot 2013-12-06 at 7 13 53 pm](https://f.cloud.github.com/assets/289269/1697610/05aec20c-5eee-11e3-8d50-49618632ef47.png)

Important change is [here](https://github.com/kuyan/the-blue-alliance/commit/6db77a2bc556d85f8f90118714c3d03039eba31a#diff-a5b7cc14262bfa91dd385f2ee8dbbea3R89) - sorry, Sublime automatically removes extraneous whitespace.

This can be reproduced on 7d04769c62a26875f06dcc4e151e87654b526f6c with screen sizes falling into Bootstrap's medium device designation - that is, widths falling within x 992px ≥ x > 1200px