title: How use third-party plugins after install in npm?
body: <p>I install plugin (for instance normalize.css or jQuery) with npm install command. </p>
  
  <pre><code>npm install normalize.css --save
  npm install jquery --save
  </code></pre>
  
  <p>I see them in package.json</p>
  
  <pre><code>  "dependencies": {
      "normalize.css": "^7.0.0"
    }
  </code></pre>
  
  <p>What next? How i can use it in my project? I'm using gulp and I do not know what to do next.</p>