added metainfo to create deb package of piler

debian/preinst

@@ -0,0 +1,41 @@
+#!/bin/sh
+set -e
+
+create_piler_user() {
+   id piler &>/dev/null
+
+   if [ $? -ne 0 ]; then
+      groupadd piler
+      useradd -g piler -s /bin/sh -d /var/piler piler
+      usermod -L piler
+   fi
+
+}
+
+
+save_current_config() {
+   BAKFILE=/usr/local/etc/piler.conf.`date +%s`
+   cp /usr/local/etc/piler.conf $BAKFILE
+}
+
+
+case "$1" in
+    install)
+	create_piler_user
+        ;;
+
+    upgrade|abort-upgrade)
+	save_current_config
+        ;;
+
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 0
+        ;;
+esac
+
+#DEBHELPER#
+
+exit 0
+
+