title: npm install not installing any packages
body: <p>Im trying to test an old project, and when i run npm install, all i get is:</p>
  
  <pre><code>npm WARN package.json xx@ No repository field.
  npm WARN package.json xx@ No license field.
  </code></pre>
  
  <p>My package.json file looks like this:</p>
  
  <pre><code>{
  "name": "xx",
  "version": "",
  "dependencies": {},
  "devDependencies": {
    "connect-livereload": "~0.3.2",
    "grunt": "~0.4.1",
    "grunt-bg-shell": "~2.3.1",
    "grunt-contrib-csslint": "^0.2.0",
    "grunt-contrib-sass": "^0.8.1",
    "grunt-contrib-uglify": "^0.6.0",
    "grunt-contrib-watch": "~0.5.3",
    "grunt-newer": "^0.8.0",
    "grunt-ngrok": "^0.2.2",
    "load-grunt-tasks": "~0.2.1",
    "time-grunt": "~0.2.7"
  },
  "engines": {
    "node": "&gt;=0.8.0"
  }
  </code></pre>
  
  <p>}</p>
  
  <p>I havent run this kind of install in a while and im afraid im forgetting something, any ideas as to what ?</p>
  
  <p>EDIT: it turns out the folder copy i had of the project had already a node_modules folder with everything installed, reason why running npm install wasnt doing anything. Although i thought there would be some kind of warning or message saying all modules are installed already.</p>