update docstrings on Deployment, Service, and Secret
update docstrings on Deployment, Service, and Secret

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