Theming changes

res/static/img/background_patterns/create_transparent.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+transparent () {
+	convert $1.png -alpha set -channel a -evaluate set $2 $1_transparent.png
+}
+
+for i in {0..17}; do transparent "checker${i}" 5%; done
+transparent "checker_wednesday" 8%
+transparent "checker_dwarf" 5%
+transparent "checker_developers" 5%
+transparent "checker_halloween" 5%
+transparent "checker_christmas" 5%
+transparent "checker_ukraine" 8%
+
+optipng *.png