title: npm WARN SKIPPING OPTIONAL DEPENDENCY when npm install vue-resource --save
body: <blockquote>
    <p>npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for
    fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current:
    {"os":"win32","arch":"x64"})</p>
  </blockquote>