Import upstream Diehard4 by obscurant

Verbatim contents of the upstream GitHub archive (Diehard4-master.zip,
commit 254ee204deebc64793123a9643c85b7d113c6c22, files dated 2019-05-21).

Imported unmodified so that every change in this fork is visible as a diff
against the original, which is what GPL-3.0 section 5(a) is asking for.
All code in this commit is obscurant's work, not mine.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -0,0 +1,33 @@
+# Diehard4
+GTK3 Theme
+
+![screenshot](http://i.imgur.com/7yelOkR.png)
+
+Full rewrite of the gtk2/gtk3 themes. Includes themes for cinnamon, openbox, xfwm, pekwm and tint2. Unity support is included, but it's not so great.
+
+Font is cure, from the [Artwiz](http://sourceforge.net/projects/artwiz-latin1) font pack ([install guide](http://whatnotlinux.blogspot.com/2011/11/install-artwiz-fonts-in-ubuntu.html)).  
+Icons are [Faenza](http://tiheum.deviantart.com/art/Faenza-Icons-173323228) and [Variations](http://www.deviantart.com/art/VARIATIONS-1-201731613).  
+[Wallpaper](http://i.imgbox.com/o3LkOuEW.png)  
+[Audacious skin](http://zomby.deviantart.com/art/Diehard4-for-Audacious-599888259)  
+
+Changelog  
+v1.5 (3/17/16)  
+• Cinnamon theme rewrite  
+• gtk3 tab padding reduction  
+• Fixes to unselected tab close button  
+• Fixes to terminal tabs  
+
+v1.4  
+• gtk3 toolbar, menubar padding reduction  
+• gtk3 Menubar text color  
+• gtk3 Tweaks to seekbars  
+• Metacity text color  
+
+v1.3  
+• Fixed resize bug with some applications
+
+v1.2  
+• gtk2 menu arrow selected  
+• gtk2 input padding  
+• gtk2 progress bar height  
+• Added style for Reddit Reader desklet in Cinnamon theme