[Bug 1093362] Download button placement issue is fixed

As far as I have checked, it works for me.
![screenshot from 2014-12-10 23 59 59](https://cloud.githubusercontent.com/assets/6432146/5381766/7379e4f2-80ca-11e4-9bd7-15c8b43b7f66.png)
![screenshot from 2014-12-11 00 00 15](https://cloud.githubusercontent.com/assets/6432146/5381767/788baf48-80ca-11e4-87df-cfc864418e41.png)


I have added this because I saw that the description did not have the class download-desc assigned to it, so applying the class to each and every download-box would not be the right idea, so I added this. I will attach the screenshot of how it looks now.
![screenshot from 2014-12-16 15 02 44](https://cloud.githubusercontent.com/assets/6432146/5451718/cbf4eb14-8538-11e4-8d49-a372e4109279.png)