added mongose and express, modified server, for testing purpose added user controller, model and routes

api/routes/userRoutes.js

@@ -0,0 +1,15 @@
+'use strict';
+
+module.exports = function(app) {
+    var user = require('../controllers/userController');
+
+    // TODO  Routes
+    app.route('/users')
+        .get(user.list_all)
+        .post(user.add_user);
+
+    app.route('/users/:userId')
+        .get(user.get_user)
+        .put(user.update_user)
+        .delete(user.remove_user);
+};