Resolve "prepare installable debian package"

Closes #342 (closed)

debian-template/postrm

+#!/bin/sh
+
+set -e
+
+if [ -d /run/systemd/system ]; then
+  systemctl --system daemon-reload >/dev/null || true
+fi
+
+case "$1" in
+  purge)
+  rm -rf /usr/lib/smasch
+  if getent passwd smasch >/dev/null; then
+    userdel smasch
+  fi
+  if getent group smasch >/dev/null; then
+    groupdel smasch
+  fi
+  rm -rf /run/gunicorn/
+
+;;
+  remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
+;;
+
+*)
+    echo "postrm called with unknown argument \`$1'" >&2
+    exit 1
+;;
+esac
+
+#DEBHELPER#
+
+exit 0