Update of SwitchDesk

Change highlights:
– Improved portability – relative paths are now stored for cached wallpaper images.
– Stability improvements.
NOTE: Cached filename format has been changed
from: switchdesk..
to: switchDesk-.
and config filename has been changed
from: switchdesk.
to: switchDesk-.cfg
to avoid some potential issues. Rename your existing files in your user directory as necessary if you want to keep your current settings.
You will find the download link on the Modules page. Also added a new Icon contribution.