[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)


The order of these two classes is backwards, the parent class needs to come first like: .download-box .download-button