Improved wallpaper checker

I’ve decided to update the wp_filter.py script. I fixed a good deal of bugs and at the same time I added a simple text-driven menu in order to simplify the program use, and I also added a readme file that describes operation and other requirements. You can download the program in [tar.gz format]({{ site.url }}/files/wp_filter.tar.gz) or in [zip format]({{ site.url }}/files/wp_filter.zip). For basic requirements, refer to my [previous blog post]({{ site.url }}/2006/12/23/wallpaper-size-checker/). Comments are welcome.