Update notice and changelog for 21.05.0

CHANGELOG.md

@@ -1,8 +1,14 @@
 # Change Log
 
 [Releases](https://github.com/NetApp/harvest/releases)
-
 ## 21.05.0 / 2021-05-20
+
+Announcing the release of Harvest2. With this release the core of Harvest has been completely rewritten in Go. Harvest2 is a replacement for the older versions of Harvest 1.6 and below. 
+
+If you're using one of the Harvest 2.x release candidates, you can do a direct upgrade. 
+
+Going forward Harvest2 will follow a `year.month.fix` release naming convention with the first release being 21.05.0. See [SUPPORT.md](SUPPORT.md) for details.
+
 **IMPORTANT** v21.05 increased Harvest's out-of-the-box security posture - self-signed certificates are rejected by default. You have two options:
 
  1. [Setup client certificates for each cluster](https://github.com/NetApp/harvest-private/blob/main/cmd/collectors/zapi/README.md)

NOTICE

@@ -0,0 +1,19 @@
+NetApp Notice Report
+
+Copyright 2021
+
+About this document
+The following copyright statements and licenses apply to the software components that are distributed with Harvest version 21.05.0.  This product does not necessarily use all the software components referred to below.
+
+Where required, source code is published at the following location.
+https://opensource.netapp.com/
+
+Components:
+
+github.com/hashicorp/go-version
+https://github.com/hashicorp/go-version v1.3.0
+Mozilla Public License 2.0
+
+github.com/spf13/cobra
+https://github.com/spf13/cobra v1.1.3
+Apache License 2.0