Update Pipes 1 artistic motif directory structure:
    
        - Move `Pipes/1/Distro/5.5/Media' up to `Pipes/1/Media' and remove
          `Pipes/1/Disto/5.5' directory.
    
        - Installation media images, based on Pipes 1 artistic motif, are
          rendered using the `trunk/Identity/Images/Themes/Pipes/1/Media'
          directory as source and the `--releasever' and `--basearch'
          options to control the release and architecture the images are
          produced for.