Add minify-css.sh

tools/minify-css.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+cd 'dest/www/res/styles' || (echo "minify-css.sh: error" >&2; exit 1)
+files=$(echo 'styles.css'; grep -E '^@import "(.*)";' 'styles.css' | sed 's/@import "\|";//g')
+wc -c $files
+sed ':a;N;$!ba;s/[ \n]\{1,\}/ /g' $files | sed 's/ \?\([{}>;,]\) \?/\1/g' | sed 's/@import[^;]*;\|^ \| $//g' > min.css
+wc -c min.css