1.13.0
   * pump version to 1.13.0
1.12.0

1.10.0
  * Add Ubuntu MATE wallpapers without branding, by Ubuntu MATE team
  * Add new MATE-Stripes-Dark.png, MATE-Stripes-Light.png wallpapers by hekel

1.8.0
  * Add new "Float into MATE" wallpaper by Rowen Stipe
  * Add artist tag in XML files