Update README with instructions on using the plugin
Update README with instructions on using the plugin

Brantone/saml-plugin,robingarner/saml-plugin,remusb/saml-plugin,jenkinsci/saml-plugin,remusb/saml-plugin,Brantone/saml-plugin,jenkinsci/saml-plugin,Sauraus/saml-plugin,connectifier/jenkins-saml-plugin,jenkinsci/saml-plugin,robingarner/saml-plugin,Sauraus/saml-plugin