Created attachment 5669 [details] Add appdata file Patch to add appdata support. See https://mail.xfce.org/pipermail/xfce4-dev/2014-May/030717.html for additional details.
The patch needs to be updated before merging, currently it's missing the <project_group> and <translation> tags. https://mail.xfce.org/pipermail/xfce4-dev/2016-January/031573.html https://mail.xfce.org/pipermail/xfce4-dev/2016-January/031574.html