title: Gulp doesn't work
body: <p>I installed gulp on my machine, but when i try to compile my project i have this error:</p>
  
  <pre><code>Error: Cannot find module 'del'
      at Function.Module._resolveFilename (module.js:338:15)
      at Function.Module._load (module.js:280:25)
      at Module.require (module.js:364:17)
      at require (module.js:380:17)
      at Object.&lt;anonymous&gt; (/Applications/MAMP/htdocs/project/gulpfile.js:6:11)
      at Module._compile (module.js:456:26)
      at Object.Module._extensions..js (module.js:474:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:312:12)
      at Module.require (module.js:364:17)
  </code></pre>
  
  <p>I dont understand the error and i dont know how solve.
  Someone can help me?
  Thanks</p>