title: npm: run scripts from package.json from anywhere inside the project folder
body: <p>I'm using the <code>scripts</code> section inside the package.json file to store some commands I have to run regularly.</p>
  
  <pre><code> "scripts": {
      "test": "./test/phantomjs ./test/js/run_jasmine_test.coffee ./test/index.html",
      "rjs": "r.js -o ./js/app.build.js",
      "less": "lessc -x ./css/app.less &gt; ./css/app.css"
    }
  </code></pre>
  
  <p>in every command I have got a <code>./</code> at the beginning of the path - this is why I can only call <code>npm run-script rjs</code> from the project's root directory.
  is there a way to reference the project's root directory inside the package.json so that I can run e.g. <code>npm test</code> from anywhere in my project?</p>