Added getVersion() groovy function

vars/getVersion.groovy

@@ -0,0 +1,14 @@
+#!/usr/bin/env groovy
+
+/** 
+ * Run semver_get_version to return the current version of the repository
+ *
+ * @param flags Flags or arguments to pass to semver_get_version
+ * @return "1.9.2"
+ */
+def call(flags='') {
+    def VERSION
+    VERSION = sh(returnStdout: true, script: "semver_get_version ${flags}")
+    return VERSION.trim()
+}
+