|Adwaita folder contains my gtk2 that approximates the look of the Dark Adwaita gtk3 theme.|
Place the gtk-2.0 folder in /user/share/themes/Adwaita (back up your default gtk-2.0 folder), or place the entire Adwaita folder in your ~/.themes folder.
The firstname.lastname@example.org folder is the Gradient Top Bar extension by Julien Pecqueur with a modified stylesheet.css to more closely fit the look of the theme, in my opinion.
Place it in the gnome-shell/extensions folder that suits your preference.
Should be compatible with Gnome shell versions 3.12-3.18
Also included are a couple wallpapers that I modified from the Adwaita design.