Github link on push

Adds a `View on Github` link on successful push.

![screen shot 2014-06-11 at 5 10 55 pm](https://cloud.githubusercontent.com/assets/2711803/3252679/1eb26b12-f1c6-11e3-9e8e-3091fe1ed533.png)

@ussuri  As per request :)
type missing.