gtk-3: set menu border.
gtk-3: increase saturation of asset images by
 $ mkdir orig
 $ cp *png orig
 $ cd orig
 $ for file in * ; do convert $file -modulate 100,161,100 ../$file ; done
gtk-3: deepen the color of progress bars by
$ for file in progress*.png ; do convert $file -modulate 45,170,100 conv-$file ; done
gtk-3: set foreground color for progressbars and their troughs.
gtk-3: darker checkbox/radio in menuitem by
$ mkdir orig
$ cp menuitem-*-{checked,mixed}.png orig
$ for in `ls orig`; do convert orig/$file -modulate 20,100,100 $file; done
gtk-3: remove ugly borders around check/radio in menuitem. Actually it turns out to be box-shadow.
gtk-3: set color scheme of infobars to the same as gtk-2's.
gtk-3: import progressbar images from screenshot of gtk-2 progress bar.
Add example image.