Fix first install on failed first deployment (#34)

* Fix problem with failed first deployment (needs install) as per #32

assets/out

@@ -57,14 +57,16 @@ fi
 is_deployed() {
  if [ -n "$1" ]; then
  set +e
- helm status --tiller-namespace $tiller_namespace $1 | grep "STATUS: " > /dev/null
+ set +o pipefail
+ helm history --tiller-namespace $tiller_namespace $1 2>&1 | grep "DEPLOYED" > /dev/null
  if [ $? = 0 ]; then
  # exists
  echo true
  else
  # does not exist
  echo false
  fi
+ set -o pipefail
  set -e
  else
  echo false