Git bundler service received some love

I made a few changes to my bundler service. Not only do I display how many bundles there are hosted, but also how much disk space they take. This number is also displayed for each individual bundle. I also made the layout a bit wider to avoid overflowing text when displaying the instructions how to download the bundle. And most importantly, I published the code on github. So if you want to see how it works or contribute, please do so.