title: npm install from git repo subfolder
body: <p>I have a repo with various components and I want to be able to include the components as individual dependencies (but I don't want to create a repo per component).</p>
  
  <p><strong>Is it a way to use a subfolder of a github repo as the path for a dependency in npm</strong> ? (that will not involve creating separate branches per component)</p>
  
  <p>Something like</p>
  
  <p><code>dropdown: git+https://git@github.com/me/mycomponents.git/components/dropdown</code></p>