version 3.19.90
 - Use same alias as upstream for XDG directories
   https://bugzilla.gnome.org/show_bug.cgi?id=761952
 - Rename icon to match application namespace
   This is required in preparation for xdg-app.

   https://bugzilla.gnome.org/show_bug.cgi?id=761197
 - Drop udev dependency
   All that udev was used for is now covered by GstDeviceMonitor.
 - Add a missing tag to the AppData file
 - Update the AppData to spec version 0.7+
 - build-sys: Annotate we don't support srcdir != builddir from git
   Due to vala.