Tweaked Fedora art.

I felt like toying with the Fedora logo a bit, and made some small changes. Maybe you want them, maybe you don't.

Before
![before](https://f.cloud.github.com/assets/2435101/907240/b97574bc-fd1d-11e2-80c9-6c2b9729adb2.png)

After
![after](https://f.cloud.github.com/assets/2435101/907241/c2463fae-fd1d-11e2-8ba3-37b8fa877c8b.png)