title: npm not creating node_modules folder in project directory
body: <p>I am doing a small Sinatra project and I want to use Gulp.</p>
  
  <p>I have node(v0.12.0), npm(2.13.1), gulp(3.9.0) installed. I am in my project directory but when I try install a package like "npm install gulp-sass --save-dev", it doesn't create any "node_modules" folder in my project directory. It seems to be installing the package in my user home directory. Anything I am doing wrong?</p>