how to import vendors ? #343

polyfills.js:7530 [at-loader] ./src/app/auth/auth.service.ts:56:25 
TS2686: '_' refers to a UMD global, but the current file is a module. Consider adding an import instead.

polyfills.js:7530 [at-loader] ./src/vendor.ts:14:13 
TS6133: '_' is declared but never used.

// Angular 2
import '@angular/platform-browser';
import '@angular/platform-browser-dynamic';
import '@angular/core';
import '@angular/common';
import '@angular/http';
import '@angular/router';

import 'rxjs';
import '@angularclass/hmr';

// Other vendors for example jQuery, Lodash or Bootstrap
// You can import js, ts, css, sass, ...
import * as _ from 'lodash';