add favicon

src/favicon-create.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env sh
+# Create based on the PNG image.
+set -o nounset   # set -u : exit the script if you try to use an uninitialised variable
+set -o errexit   # set -e : exit the script if any statement returns a non-true return value
+#set -o verbose   # set -v : Prints shell input lines as they are read.
+#set -o xtrace    # set -x : Print command traces before executing command
+
+convert -resize x16 -gravity center -flatten -colors 256 -background transparent \
+  "favicon.png" "favicon.ico"