Created attachment 2649 
patch to add directory thumbnails

I've implemented directory thumbnails for Thunar. 

The idea is following: 
Whenever Thunar looks up thumbnail for directory, it checks if image file
"directory/.DirThumb" exists. If so, Thunar composes content of .DirThumb over
direcory icon from current icon theme.

To make creation of directory thumbnails easy, I've made a simple script that
takes file name, fetches its thumbnail and saves it as .DirThumb in the same
directory. I've bound it as user action for media, image and other files.

Here is a video of how it looks in reality
http://aanatoly.blogspot.com/2009/11/thunar-with-directory-thumbnails.html


Performance: all images are cached, so image loading and compositing done once
per directory per icon size. However, lstat syscall is done on every lookup.
Need more work here.