Add additional files to release bundle (#290)
Add additional files to release bundle (#290)

* add cleanup scripts to the release bundle

* add root level LICENSE and README.md's to release per scrum call


Former-commit-id: 033ea6a879c5dffb48e43d12119420b72395af4c
geeknoid/istio,frankbu/istio,frankbu/istio,sebastienvas/istio,smawson/istio,mandarjog/istio,sebastienvas/istio,smawson/istio,mandarjog/istio,geeknoid/istio,frankbu/istio,geeknoid/istio,mandarjog/istio,sebastienvas/istio,frankbu/istio,sebastienvas/istio,geeknoid/istio,smawson/istio,istio/istio,istio/istio,smawson/istio,mandarjog/istio,geeknoid/istio,mandarjog/istio,frankbu/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio,istio/istio,frankbu/istio,istio/istio,sebastienvas/istio