Download and install the plugin using the Plugin Manager using the following URL. Refer to Plugins on how to install plugins manually.
You can also get the svn version using this command:
To install, either extract the downloaded zip file manually into ./lib/plugins/ or use the provided Download URL with the plugin manager.
You can get more information on the plugin's website: http://www.infinicode.org/code/dw/
Icons are from the Tango Project,licensed under the Creative Commons Attribution Share-Alike license, and from the GNOME project, licensed under the GPL-2.