title: jQuery is not defined for angular 2
body: <p>I am trying to use ng2-datetime. However, when I follow the instruction and installed npm install --save ng2-datetime, I get the following error.</p>
  
  <p><a href="https://i.stack.imgur.com/UKkmv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/UKkmv.png" alt="jQuery not defined"></a></p>
  
  <p>I have tried running the following npm install but it doesnt fix anything.</p>
  
  <pre><code> npm install jquery --save 
   npm install @types/jquery --save-dev
  </code></pre>
  
  <p>My package.json file</p>
  
  <pre><code>  {
    "name": "timesheet-web-app",
    "version": "0.0.0",
    "license": "MIT",
    "angular-cli": {},
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "lint": "tslint \"src/**/*.ts\"",
      "test": "ng test",
      "pree2e": "webdriver-manager update --standalone false --gecko false",
      "e2e": "protractor"
    },
    "private": true,
    "dependencies": {
      "@angular/common": "^2.3.1",
      "@angular/compiler": "^2.3.1",
      "@angular/core": "^2.3.1",
      "@angular/forms": "^2.3.1",
      "@angular/http": "^2.3.1",
      "@angular/platform-browser": "^2.3.1",
      "@angular/platform-browser-dynamic": "^2.3.1",
      "@angular/router": "^3.3.1",
      "@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.18",
      "angularfire2": "^2.0.0-beta.7",
      "bootstrap": "^4.0.0-alpha.6",
      "bootstrap-datepicker": "^1.6.4",
      "core-js": "^2.4.1",
      "firebase": "^3.6.6",
      "jquery": "^3.1.1",
      "ng2-datetime": "^1.2.2",
      "ng2-datetime-picker": "^0.12.7",
      "ng2-file-upload": "^1.2.0",
      "rxjs": "^5.0.1",
      "ts-helpers": "^1.1.1",
      "zone.js": "^0.7.2"
    },
    "devDependencies": {
      "@angular/compiler-cli": "^2.3.1",
      "@types/jasmine": "2.5.38",
      "@types/jquery": "^2.0.39",
      "@types/node": "^6.0.42",
      "angular-cli": "1.0.0-beta.24",
      "codelyzer": "~2.0.0-beta.1",
      "jasmine-core": "2.5.2",
      "jasmine-spec-reporter": "2.5.0",
      "karma": "1.2.0",
      "karma-chrome-launcher": "^2.0.0",
      "karma-cli": "^1.0.1",
      "karma-jasmine": "^1.0.2",
      "karma-remap-istanbul": "^0.2.1",
      "protractor": "~4.0.13",
      "ts-node": "1.2.1",
      "tslint": "^4.0.2",
      "typescript": "~2.0.3"
    }
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/nSfqz.png" rel="noreferrer"><img src="https://i.stack.imgur.com/nSfqz.png" alt="My folder structure"></a></p>