x11-themes/zuki-themes: add new port
Simple gray themes for GTK-based desktops.
Features:
- gnome-shell is the theme for GNOME Shell. This themes stuff like the calendar widget, the panel, the dock and more.
- gtk-2.0 contains the GTK+2 theme, styling applications that doesn't use GTK+3 yet.
- gtk-3.0 contains the GTK+3 theme, styling most modern GTK+ applications.
- xfwm4 contains the theme that styles the xfwm4 window manager for XFCE4.