add a simple deploy script

It's rather hacky and untested, but should do the job.

script/deploy.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+server='master0.entrydns.net'
+
+if [[ $# != 1 ]]; then
+  echo 'Specify rpm file to deploy'
+  exit 1
+else:
+  package=${1}
+fi
+
+scp ${package} ${server}:/tmp
+
+ssh -t ${server} "sudo yum update -y /tmp/${package}"
+ssh -t ${server} "su - entrydns -c 'cd ${HOME} && bundle exec rake db:migrate RAILS_ENV=production'