Shotwell 0.29.0 - 24 Apr 2018
  * Fix an issue with undefined symbols with certain compilers
  * Remove autotools supports
  * Add GIF support (read-only, animations not supported)
  * Bump GTK requirement to 3.22 and remove deprecated function calls
  * Change some internal drawing to use GTK+ API instead of using Cairo directly
  * Add import rolls
  * Minor visual improvements
  * Dead code and asset removal

Bugs fixed in this release:
 - https://bugzilla.gnome.org/show_bug.cgi?id=716284
 - https://bugzilla.gnome.org/show_bug.cgi?id=717833