title: grunt js installing packages
body: <p>I'm building a grunt javascript project with grunt, and I have a package.json file that looks something like:</p>
  
  <pre><code>{
     ... name, author, etc here ...
  
     "dependencies": {
        "grunt-html":"0.2.1"
     }
  
   }
  </code></pre>
  
  <p>I can run <code>npm install</code> to install grunt-html and this works just fine. But when I add new dependencies, all developers on the team must know to run <code>npm install</code> again. Is there a way to automatically install any packages that have not yet been installed? Should I just run npm install always to ensure I'm up to date?</p>