Xfce4 port to Gtk3 and gdbus

Staging PPA: ppa:unit193/xfce4-gtk3

Testing PPA: ppa:xubuntu-dev/xfce4-gtk3

Xfce 4.14 roadmap

xfce4-session roadmap

• garcon
• tumbler
  1. gdbus port.
• xfconf
  1. gdbus port.
  2. Currently in an unusable state.
• xfce4-appfinder
• xfce4-taskmanager

• xfce4-clipman-plugin
  1. Fails distcheck.
• xfce4-datetime-plugin
• xfce4-diskperf-plugin
• xfce4-fsguard-plugin
• xfce4-genmon-plugin
• xfce4-mpc-plugin
• xfce4-smartbookmark-plugin
• xfce4-systemload-plugin