title: npm install package from github repo subfolder
body: <p>Is it possible to install npm package from github when the package located inside subfolder?</p>
  
  <p>For example, we have Microsoft BotBuilder repository:
  <a href="https://github.com/Microsoft/BotBuilder" rel="noreferrer">https://github.com/Microsoft/BotBuilder</a></p>
  
  <p>But I need to install package inside subfolder "Node/core/":
  <a href="https://github.com/Microsoft/BotBuilder/tree/master/Node/core/" rel="noreferrer">https://github.com/Microsoft/BotBuilder/tree/master/Node/core/</a></p>
  
  <p>So how can I install it with npm?</p>