version 3.1.1
-------------

 New features and user visible changes:

  * Added ability to load and save WebP images.
  * Allow to specify the format options when saving a file (can be disabled).
  * Save and restore the window maximized state, the filterbar status, the
    visited locations history and the viewer sidebar status.
  * Image viewer: use the dark background by default, and use a more neutral
    color instead of black.
  * Video viewer: save and restore the volume level.
  * Read system bookmarks from XDG_CONFIG_HOME/gtk-3.0/bookmarks. Fallback to
    ~/.gtk-bookmarks if the new file is not found. (#675401)
  * Use XDG_CACHE_HOME/thumbnails as thumbnail cache. Fallback to the old
    ~/.thumbnails directory if the new directory doesn't exists.
  * File list: align the caption to the left and use a smaller font.
  * Browser: show loading errors in the info bar instead of using a modal
    dialog.
  * Added automatic completion to the category entry.
  * Rotation tool: allow to rotate an image from -180 to 180 degrees.
  * Selections: allow to cut the files.
  * Added a menu item to hide/show the file properties.
  * Print: set a good default filename for the print-to-file operation.
  * Enhance colors: use a faster algorithm and rename to "Adjust Contrast".
  * Equalize histogram: use a faster algorithm.
  * Desaturate tool: added ability to choose the method to use, renamed to
    "Grayscale".
  * Removed the format chooser from the file dialog.
  * Added an high resolution application icon.
  * Add an application menu if used with GNOME Shell.