Bug 573733 - Readme file for 4.20 Change-Id: I623dc09a5463224c45bd69c880fc26933467925b Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.releng/+/180947 Tested-by: Sarika Sinha <sarika.sinha@in.ibm.com> Reviewed-by: Sarika Sinha <sarika.sinha@in.ibm.com>