Merge branch 'master' into 'master'

Update README.md

Closes #41

See merge request to-be-continuous/helm!68

README.md

@@ -442,7 +442,7 @@ If supported methods don't fit your needs, you may provide a `helm-publish.sh` s
 
 This script may use the following variables:
 
-* `$helm_package`: the packaged chart to publish,
+* `$helm_package_file`: the packaged chart to publish,
 * `$HELM_PUBLISH_USER`, `$HELM_PUBLISH_PASSWORD` and `$HELM_PUBLISH_URL` (see above).
 
 ### `helm-test` job