title: Install only one package from package.json?
body: <p>Suppose that somewhere in my <code>package.json</code> I have:</p>
  
  <pre><code>"dependencies": {
      "bower": "1.0.0",
      // zillion other dependencies
  }
  </code></pre>
  
  <p>Is there a way to make npm install <strong>only</strong> bower@1.0.0 from my <code>package.json</code>? Like so: <code>npm install --only bower</code>.</p>
  
  <p>My goal is to make <code>npm install</code> and <code>bower install</code> run simultaneously.</p>