 add Compatability section to README.md
 add Compatability section to README.md

test compatability for kubernetes-client 1.3.92 & kubernetes-client 3.0.3 on Kubernetes 1.4.9&1.6.2&1.7.10
rhuss/kubernetes-client,KurtStam/kubernetes-client,rhuss/kubernetes-client,fabric8io/kubernetes-client,KurtStam/kubernetes-client,fabric8io/kubernetes-client,fabric8io/kubernetes-client,rhuss/kubernetes-client,KurtStam/kubernetes-client