DesktopNova 0.8 released

Written for DesktopNova by Stefan Haller on 2010-04-28

You can download the new release from the download page.

ChangeLog:
* Version 0.8
* rewrote history code (fixed many bugs)
* recognize missing wallpapers and try to set a new one
* don't allow a wallpaper to be multiple times in the history
* custom file extension filters