Support Stdin when using downloaders of plugin
Support Stdin when using downloaders of plugin

Inject os.Stdin into the command of helm plugin's downloaders

SlickNik/helm,technosophos/deployment-manager,technosophos/deployment-manager,jascott1/helm,technosophos/deployment-manager,fibonacci1729/helm,jascott1/helm,SlickNik/helm,appscode/helm,fibonacci1729/helm,technosophos/deployment-manager,technosophos/k8s-helm,appscode/helm,technosophos/k8s-helm,technosophos/deployment-manager