Code review comment for lp:~lottanzb/lottanzb/0.5-icons

I agree that the changes make the icons a little bit more clean. My main intention of this change was to update the icons to perfectly fit into the Humanity icon theme introduced in Ubuntu 9.10. Please forgive me for being so Ubuntu-centered. I guess that the icons don't look that bad in other Linux distributions and GTK themes and the lion's share of LottaNZB users are Ubuntu users anyway.

Here's a side-by-side comparison: http://dl.dropbox.com/u/232786/icons.png

I consider util/render-icons the most important part of this changeset because it allows us to make a slight change to the SVG icons and update all PNG icons in data/icons with a single command.