Update ReadMe.md; Add gitPushTags.groovy; Update setup.py;

vars/gitPushTags.groovy

@@ -0,0 +1,18 @@
+#!/usr/bin/env groovy
+
+/**
+ * Pushes tags to a repo
+ *
+ * @param creds The Jenkins Git credentials to use.
+ */
+
+def call(creds) {
+
+  withCredentials([usernamePassword(credentialsId: creds, usernameVariable: 'GIT_USERNAME', passwordVariable: 'GIT_PASSWORD')]) {
+    def gitOrigin = sh(script: "git remote", returnStdout: true).trim()
+    // Need to remove the protocol to add in user name and host
+    def gitHost = sh(script: "git remote get-url ${gitOrigin}", returnStdout: true).trim().replaceFirst('https://','')
+    // Push tags to branch
+    sh("git push https://${env.GIT_USERNAME}:${env.GIT_PASSWORD}@${gitHost} --tags") 
+  }
+}