Highlight the current branch during updating

Hi Aanand.
I am a very fond user of your great git-up gem, and recommend it to many of my co-workers.
I mostly use it together with gitall (https://github.com/JKrag/gitall - forked from walterblaurock), on 10+ repos at once, so improving instant overview is very important to me.
I recently attempted mod'ing your git-up gem in order to highlight my current branch in the (sometimes long) list of branches it is updating.
I was pretty happy with the result, so I though I would submit it as a pull-request. I am not an expert ruby'ist, so you might know a cleaner way to code this, and I also haven't really investigated if this is a candidate for a configurable option - but for me at least it makes great sense as a default behaviour, and doesn't really disturb anything.
Regards Jan