Adaptive Gtk+ theme based on Material Design Guidelines.

Supported Desktop Environments:

* GNOME-Shell     >= 3.20.0
* GNOME-Flashback >= 3.20
* Cinnamon        >= 3.2.0
* XFce4           >= 4.12.2
* Mate            >= 1.14.0
* LXDE            >= 0.99.1 (Gtk+ 2.x only)
