Increase logo hover scale to fix visual artifact. Fixes #1037

Not sure if this is a Chrome bug or what, but increasing the transform scale to `1.06` resolves #1037. Looks the same in Safari and Firefox, which don't have this rendering issue.

`1.05`
![screen shot 2013-10-28 at 6 47 37 pm](https://f.cloud.github.com/assets/602654/1425474/5fae4a14-403c-11e3-85d1-c35d58bbde82.png)
`1.06`
![screen shot 2013-10-28 at 6 46 30 pm](https://f.cloud.github.com/assets/602654/1425475/60fc4844-403c-11e3-84e8-9e0aa50502b5.png)