add install script

script/install

@@ -0,0 +1,18 @@
+#! /bin/sh
+
+set -e
+
+cd "$(dirname "$0")/.."
+
+echo "=> Installing shutdown listener...\n"
+sudo mv listen-for-shutdown.py /usr/local/bin/
+sudo chmod +x /usr/local/bin/listen-for-shutdown.py
+
+echo "=> Starting shutdown listener...\n"
+sudo mv listen-for-shutdown.sh /etc/init.d/
+sudo chmod +x /etc/init.d/listen-for-shutdown.sh
+
+sudo update-rc.d listen-for-shutdown.sh defaults
+sudo /etc/init.d/listen-for-shutdown.sh start
+
+echo "Shutdown listner installed."