updating release notes for v1.4.0-rc

release-notes.md

@@ -1,4 +1,16 @@
-# v1.3.0-rc
+# v1.4.0-rc
 
-- Support for using YAML for desired state files.
-- Support for passing values directly through the `set` flag in the desired state file.
+> If you are already using an older version of Helmsman, please read the changes below carefully and follow the upgrade guide [here](docs/migrating_to_v1.4.0-rc.md)
+
+- Slack notifications for Helmsman plan and execution results. Issue #49
+- RBAC Improvements:
+    - Validation for service accounts to be used for deploying Tillers. Issue #47
+    - Support creating RBAC service accounts for configuring Tiller(s) if they don't exist. Issue 48# 
+- Improvements for Multi-tenancy: 
+    - Adding `tillerNamespace` option for releases to select which Tiller should manage a release. Issue #32
+    - Allowing releases with the same name to be deployed with different Tillers. Issue #50
+    - Tracking Helmsman managed releases with special Helmsman labels.
+- Adding `--apply-labels` flag to label releases defined in the desired state file with Helmsman's labels.
+- Making the name option for Apps optional and using the app name from the (toml/yaml) desired state as a release name when this option is not set.
+- Changing Helmsman behavior when removing/commenting out a release in the Apps section of the desired state. Removing/commenting out a release in the desired state will result in **deleting** the release if it's labeled as `managed-by Helmsman`.
+