added whole system from ola4doc

sys/node_modules/rechoir/lib/normalize.js

@@ -0,0 +1,15 @@
+function normalizer (config) {
+  if (typeof config === 'string') {
+    return {
+      module: config
+    }
+  }
+  return config;
+};
+
+module.exports = function (config) {
+  if (Array.isArray(config)) {
+    return config.map(normalizer);
+  }
+  return normalizer(config);
+};