Down and up net speed widget.

I've started using qtile a few days ago, and when I was configuring it like my awesome-wm, I founded that there wasn't some widget I was using, and really like (others are better, like the battery widget).

So, here is my favourite and needed widget, the down and up net speed.

I don't know if you accept widgets, but if you like it, I have a few more that I really like and use it.